{"transactions":[{"id":4628708,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":32915,"kind":"person","name":"Basenese Lou","position":1,"cik":"0001809482","reported_name":"Basenese Lou","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Non-Statutory Stock Options","published_at":"2026-10-02T23:01:16.000Z","date":"2026-09-30","kind":"grant","planned":false,"acquired":true,"shares":3766,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"As compensation for services as a non-employee director during the quarter ended September 30, 2026, the reporting person was granted non-statutory stock options to purchase 3,766 shares of common stock under the ClearSign Technologies Corporation Amended and Restated 2021 Equity Incentive Plan pursuant to the issuer's non-employee director compensation policy. These non-statutory stock options were immediately vested and exercisable on the grant date."}],"balance_after":3766,"derivative":{"exercise_price":3.55,"expiration_date":"2036-09-29","underlying":"Common Stock","underlying_shares":3766},"source":{"system":"sec-edgar","filing":"0001104659-26-113417","document":"tm2626853-4_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1809482/000110465926113417/tm2626853-4_4seq1.xml","form_type":"4"}},{"id":4628714,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":33040,"kind":"person","name":"Silva Gil Todd","position":1,"cik":"0002028266","reported_name":"Silva Gil Todd","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Non-Statutory Stock Options","published_at":"2026-10-02T23:00:54.000Z","date":"2026-09-30","kind":"grant","planned":false,"acquired":true,"shares":3766,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"As compensation for services as a non-employee director during the quarter ended September 30, 2026, the reporting person was granted non-statutory stock options to purchase 3,766 shares of common stock under the Plan pursuant to the issuer's non-employee director compensation policy. These non-statutory stock options were immediately vested and exercisable on the grant date."}],"balance_after":3766,"derivative":{"exercise_price":3.55,"expiration_date":"2036-09-29","underlying":"Common Stock","underlying_shares":3766},"source":{"system":"sec-edgar","filing":"0001104659-26-113415","document":"tm2626853-3_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2028266/000110465926113415/tm2626853-3_4seq1.xml","form_type":"4"}},{"id":4628713,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":33040,"kind":"person","name":"Silva Gil Todd","position":1,"cik":"0002028266","reported_name":"Silva Gil Todd","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-10-02T23:00:54.000Z","date":"2026-09-30","kind":"grant","planned":false,"acquired":true,"shares":4225,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-employee director during the quarter ended September 30, 2026, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation Amended and Restated 2021 Equity Incentive Plan (the \"Plan\") pursuant to the issuer's non-employee director compensation policy, and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":23801,"derivative":{"underlying":"Common Stock","underlying_shares":4225},"source":{"system":"sec-edgar","filing":"0001104659-26-113415","document":"tm2626853-3_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2028266/000110465926113415/tm2626853-3_4seq1.xml","form_type":"4"}},{"id":4628716,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":24578,"kind":"person","name":"Saddler Larry Michael","position":1,"cik":"0002147866","reported_name":"Saddler Larry Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Non-Statutory Stock Options","published_at":"2026-10-02T23:00:33.000Z","date":"2026-09-30","kind":"grant","planned":false,"acquired":true,"shares":2275,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"As compensation for services as a non-employee director during the quarter ended September 30, 2026, the reporting person was granted non-statutory stock options to purchase 2,275 shares of common stock under the ClearSign Technologies Corporation Amended and Restated 2021 Equity Incentive Plan pursuant to the issuer's non-employee director compensation policy, pro-rated based on an appointment date of August 6, 2026. These non-statutory stock options were immediately vested and exercisable on the grant date."}],"balance_after":2275,"derivative":{"exercise_price":3.55,"expiration_date":"2036-09-29","underlying":"Common Stock","underlying_shares":2275},"source":{"system":"sec-edgar","filing":"0001104659-26-113413","document":"tm2626853-2_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2147866/000110465926113413/tm2626853-2_4seq1.xml","form_type":"4"}},{"id":4628722,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":33202,"kind":"person","name":"DIGIANDOMENICO ANTHONY","position":1,"cik":"0001083544","reported_name":"DIGIANDOMENICO ANTHONY","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Non-Statutory Stock Options","published_at":"2026-10-02T23:00:09.000Z","date":"2026-09-30","kind":"grant","planned":false,"acquired":true,"shares":3766,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"As compensation for services as a non-employee director during the quarter ended September 30, 2026, the reporting person was granted non-statutory stock options to purchase 3,766 shares of common stock under the ClearSign Technologies Corporation Amended and Restated 2021 Equity Incentive Plan pursuant to the issuer's non-employee director compensation policy. These non-statutory stock options were immediately vested and exercisable on the grant date."}],"balance_after":3766,"derivative":{"exercise_price":3.55,"expiration_date":"2036-09-29","underlying":"Common Stock","underlying_shares":3766},"source":{"system":"sec-edgar","filing":"0001104659-26-113412","document":"tm2626853-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465926113412/tm2626853-1_4seq1.xml","form_type":"4"}},{"id":703470,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":28758,"kind":"person","name":"PASQUESI JOHN M","position":1,"cik":"0001227099","reported_name":"PASQUESI JOHN M","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2026-07-24T20:46:02.000Z","date":"2026-07-22","kind":"purchase","planned":false,"acquired":true,"shares":500000,"price":3.54,"value":1770000.0,"ownership":{"direct":false,"nature":"By Otter Capital LLC"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"The Issuer effected a reverse stock split of its outstanding common stock at a ratio of 1-for-10, effective as of 12:01 a.m., Eastern Time, on March 16, 2026."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The reporting person is the managing member of Otter Capital LLC."}],"balance_after":1343477,"source":{"system":"sec-edgar","filing":"0001227099-26-000005","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000122709926000005/primary_doc.xml","form_type":"4"}},{"id":718161,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":32915,"kind":"person","name":"Basenese Lou","position":1,"cik":"0001809482","reported_name":"Basenese Lou","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Non-Statutory Stock Options","published_at":"2026-07-02T23:01:54.000Z","date":"2026-06-30","kind":"grant","planned":false,"acquired":true,"shares":4595,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"As compensation for services as a non-employee director during the quarter ended June 30, 2026, the reporting person was granted non-statutory stock options to purchase 4,595 shares of common stock under the ClearSign Technologies Corporation Amended and Restated 2021 Equity Incentive Plan pursuant to the issuer's non-employee director compensation policy. These non-statutory stock options were immediately vested and exercisable on the grant date."}],"balance_after":4595,"derivative":{"exercise_price":3.67,"expiration_date":"2036-06-29","underlying":"Common Stock","underlying_shares":4595},"source":{"system":"sec-edgar","filing":"0001104659-26-080470","document":"tm2619589-3_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1809482/000110465926080470/tm2619589-3_4seq1.xml","form_type":"4"}},{"id":718609,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":33040,"kind":"person","name":"Silva Gil Todd","position":1,"cik":"0002028266","reported_name":"Silva Gil Todd","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Non-Statutory Stock Options","published_at":"2026-07-02T23:01:08.000Z","date":"2026-06-30","kind":"grant","planned":false,"acquired":true,"shares":4595,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"As compensation for services as a non-employee director during the quarter ended June 30, 2026, the reporting person was granted non-statutory stock options to purchase 4,595 shares of common stock under the Plan pursuant to the issuer's non-employee director compensation policy. These non-statutory stock options were immediately vested and exercisable on the grant date."}],"balance_after":4595,"derivative":{"exercise_price":3.67,"expiration_date":"2036-06-29","underlying":"Common Stock","underlying_shares":4595},"source":{"system":"sec-edgar","filing":"0001104659-26-080468","document":"tm2619589-2_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2028266/000110465926080468/tm2619589-2_4seq1.xml","form_type":"4"}},{"id":718608,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":33040,"kind":"person","name":"Silva Gil Todd","position":1,"cik":"0002028266","reported_name":"Silva Gil Todd","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-07-02T23:01:08.000Z","date":"2026-06-30","kind":"grant","planned":false,"acquired":true,"shares":4087,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-employee director during the quarter ended June 30, 2026, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation Amended and Restated 2021 Equity Incentive Plan (the \"Plan\") pursuant to the issuer's non-employee director compensation policy, and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":19576,"derivative":{"underlying":"Common Stock","underlying_shares":4087},"source":{"system":"sec-edgar","filing":"0001104659-26-080468","document":"tm2619589-2_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2028266/000110465926080468/tm2619589-2_4seq1.xml","form_type":"4"}},{"id":719138,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":33202,"kind":"person","name":"DIGIANDOMENICO ANTHONY","position":1,"cik":"0001083544","reported_name":"DIGIANDOMENICO ANTHONY","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Non-Statutory Stock Options","published_at":"2026-07-02T23:00:18.000Z","date":"2026-06-30","kind":"grant","planned":false,"acquired":true,"shares":4595,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"As compensation for services as a non-employee director during the quarter ended June 30, 2026, the reporting person was granted non-statutory stock options to purchase 4,595 shares of common stock under the ClearSign Technologies Corporation Amended and Restated 2021 Equity Incentive Plan pursuant to the issuer's non-employee director compensation policy. These non-statutory stock options were immediately vested and exercisable on the grant date."}],"balance_after":4595,"derivative":{"exercise_price":3.67,"expiration_date":"2036-06-29","underlying":"Common Stock","underlying_shares":4595},"source":{"system":"sec-edgar","filing":"0001104659-26-080466","document":"tm2619589-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1083544/000110465926080466/tm2619589-1_4seq1.xml","form_type":"4"}},{"id":800007,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":51165,"kind":"person","name":"Deller Colin James","position":1,"cik":"0001766480","reported_name":"Deller Colin James","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2026-04-28T00:01:12.000Z","date":"2026-02-26","kind":"tax_withholding","planned":false,"acquired":false,"shares":3501,"price":5.616,"value":19661.616,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On March 2, 2026, the reporting person filed a Form 4 reporting the receipt of 210,043 shares of the Issuer's common stock, on a pre-reverse stock split basis, as a one-time bonus grant for services as an executive officer for the year ended December 31, 2025 (the \"Original Form 4\"). This amendment to the Original Form 4 is being filed to correct (i) the number of shares received in connection with the reporting person's one-time bonus grant, (ii) the number of shares withheld for tax purposes, and (iii) the number of securities beneficially owned following such transactions. The number of shares withheld is based on the closing price of the Issuer's common stock on February 26, 2026, of $5.616, as adjusted for the 1-for-10 reverse stock split effected by the Issuer on March 16, 2026."},{"field":"shares","element":"transactionShares","label":"F2","text":"Amounts and price per share figures have been adjusted to reflect the 1-for-10 reverse stock split effected by the Issuer on March 16, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Amounts and price per share figures have been adjusted to reflect the 1-for-10 reverse stock split effected by the Issuer on March 16, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On March 2, 2026, the reporting person filed a Form 4 reporting the receipt of 210,043 shares of the Issuer's common stock, on a pre-reverse stock split basis, as a one-time bonus grant for services as an executive officer for the year ended December 31, 2025 (the \"Original Form 4\"). This amendment to the Original Form 4 is being filed to correct (i) the number of shares received in connection with the reporting person's one-time bonus grant, (ii) the number of shares withheld for tax purposes, and (iii) the number of securities beneficially owned following such transactions. The number of shares withheld is based on the closing price of the Issuer's common stock on February 26, 2026, of $5.616, as adjusted for the 1-for-10 reverse stock split effected by the Issuer on March 16, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Amounts and price per share figures have been adjusted to reflect the 1-for-10 reverse stock split effected by the Issuer on March 16, 2026."}],"balance_after":31466,"source":{"system":"sec-edgar","filing":"0001104659-26-049608","document":"tm2612853-2_4aseq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465926049608/tm2612853-2_4aseq1.xml","form_type":"4/A","original_submission_date":"2026-03-02"}},{"id":800006,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":51165,"kind":"person","name":"Deller Colin James","position":1,"cik":"0001766480","reported_name":"Deller Colin James","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2026-04-28T00:01:12.000Z","date":"2026-02-26","kind":"grant","planned":false,"acquired":true,"shares":7001,"price":5.616,"value":39317.616,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On March 2, 2026, the reporting person filed a Form 4 reporting the receipt of 210,043 shares of the Issuer's common stock, on a pre-reverse stock split basis, as a one-time bonus grant for services as an executive officer for the year ended December 31, 2025 (the \"Original Form 4\"). This amendment to the Original Form 4 is being filed to correct (i) the number of shares received in connection with the reporting person's one-time bonus grant, (ii) the number of shares withheld for tax purposes, and (iii) the number of securities beneficially owned following such transactions. The number of shares withheld is based on the closing price of the Issuer's common stock on February 26, 2026, of $5.616, as adjusted for the 1-for-10 reverse stock split effected by the Issuer on March 16, 2026."},{"field":"shares","element":"transactionShares","label":"F2","text":"Amounts and price per share figures have been adjusted to reflect the 1-for-10 reverse stock split effected by the Issuer on March 16, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Amounts and price per share figures have been adjusted to reflect the 1-for-10 reverse stock split effected by the Issuer on March 16, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On March 2, 2026, the reporting person filed a Form 4 reporting the receipt of 210,043 shares of the Issuer's common stock, on a pre-reverse stock split basis, as a one-time bonus grant for services as an executive officer for the year ended December 31, 2025 (the \"Original Form 4\"). This amendment to the Original Form 4 is being filed to correct (i) the number of shares received in connection with the reporting person's one-time bonus grant, (ii) the number of shares withheld for tax purposes, and (iii) the number of securities beneficially owned following such transactions. The number of shares withheld is based on the closing price of the Issuer's common stock on February 26, 2026, of $5.616, as adjusted for the 1-for-10 reverse stock split effected by the Issuer on March 16, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Amounts and price per share figures have been adjusted to reflect the 1-for-10 reverse stock split effected by the Issuer on March 16, 2026."}],"balance_after":34967,"source":{"system":"sec-edgar","filing":"0001104659-26-049608","document":"tm2612853-2_4aseq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465926049608/tm2612853-2_4aseq1.xml","form_type":"4/A","original_submission_date":"2026-03-02"}},{"id":800172,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":33040,"kind":"person","name":"Silva Gil Todd","position":1,"cik":"0002028266","reported_name":"Silva Gil Todd","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-04-28T00:00:12.000Z","date":"2026-04-23","kind":"purchase","planned":false,"acquired":true,"shares":1000,"price":5.25,"value":5250.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents the reporting person's two separate, open-market purchases of 1,000 shares of common stock of the issuer on April 23, 2026, at a price of $5.319\nand $5.25 per share, respectively."}],"balance_after":6000,"source":{"system":"sec-edgar","filing":"0001104659-26-049607","document":"tm2612853-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2028266/000110465926049607/tm2612853-1_4seq1.xml","form_type":"4"}},{"id":800171,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":33040,"kind":"person","name":"Silva Gil Todd","position":1,"cik":"0002028266","reported_name":"Silva Gil Todd","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-04-28T00:00:12.000Z","date":"2026-04-23","kind":"purchase","planned":false,"acquired":true,"shares":1000,"price":5.319,"value":5319.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents the reporting person's two separate, open-market purchases of 1,000 shares of common stock of the issuer on April 23, 2026, at a price of $5.319\nand $5.25 per share, respectively."}],"balance_after":5000,"source":{"system":"sec-edgar","filing":"0001104659-26-049607","document":"tm2612853-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2028266/000110465926049607/tm2612853-1_4seq1.xml","form_type":"4"}},{"id":819757,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":32915,"kind":"person","name":"Basenese Lou","position":1,"cik":"0001809482","reported_name":"Basenese Lou","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Non-Statutory Stock Options","published_at":"2026-04-02T23:02:24.000Z","date":"2026-03-31","kind":"grant","planned":false,"acquired":true,"shares":3024,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"As compensation for services as a non-employee director during the quarter ended March 31, 2026, the reporting person was granted non-statutory stock options to purchase 3,024 shares of common stock under the ClearSign Technologies Corporation 2021 Equity Incentive Plan pursuant to the issuer's non-employee director compensation policy. These non-statutory stock options were immediately vested and exercisable on the grant date."}],"balance_after":3024,"derivative":{"exercise_price":4.36,"expiration_date":"2036-03-31","underlying":"Common Stock","underlying_shares":3024},"source":{"system":"sec-edgar","filing":"0001104659-26-039311","document":"tm2610943-3_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1809482/000110465926039311/tm2610943-3_4seq1.xml","form_type":"4"}},{"id":820274,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":33040,"kind":"person","name":"Silva Gil Todd","position":1,"cik":"0002028266","reported_name":"Silva Gil Todd","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Non-Statutory Stock Options","published_at":"2026-04-02T23:01:43.000Z","date":"2026-03-31","kind":"grant","planned":false,"acquired":true,"shares":3024,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"As compensation for services as a non-employee director during the quarter ended March 31, 2026, the reporting person was granted non-statutory stock options to purchase 3,024 shares of common stock under the Plan pursuant to the issuer's non-employee director compensation policy. These non-statutory stock options were immediately vested and exercisable on the grant date."}],"balance_after":3024,"derivative":{"exercise_price":4.36,"expiration_date":"2036-03-31","underlying":"Common Stock","underlying_shares":3024},"source":{"system":"sec-edgar","filing":"0001104659-26-039310","document":"tm2610943-2_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2028266/000110465926039310/tm2610943-2_4seq1.xml","form_type":"4"}},{"id":820273,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":33040,"kind":"person","name":"Silva Gil Todd","position":1,"cik":"0002028266","reported_name":"Silva Gil Todd","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-04-02T23:01:43.000Z","date":"2026-03-31","kind":"grant","planned":false,"acquired":true,"shares":3440,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-employee director during the quarter ended March 31, 2026, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan (the \"Plan\") pursuant to the issuer's non-employee director compensation policy, and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":123909,"derivative":{"underlying":"Common Stock","underlying_shares":3440},"source":{"system":"sec-edgar","filing":"0001104659-26-039310","document":"tm2610943-2_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2028266/000110465926039310/tm2610943-2_4seq1.xml","form_type":"4"}},{"id":820994,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":33202,"kind":"person","name":"DIGIANDOMENICO ANTHONY","position":1,"cik":"0001083544","reported_name":"DIGIANDOMENICO ANTHONY","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Non-Statutory Stock Options","published_at":"2026-04-02T23:00:18.000Z","date":"2026-03-31","kind":"grant","planned":false,"acquired":true,"shares":3024,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"As compensation for services as a non-employee director during the quarter ended March 31, 2026, the reporting person was granted non-statutory stock options to purchase 3,024 shares of common stock under the ClearSign Technologies Corporation 2021 Equity Incentive Plan pursuant to the issuer's non-employee director compensation policy. These non-statutory stock options were immediately vested and exercisable on the grant date."}],"balance_after":3024,"derivative":{"exercise_price":4.36,"expiration_date":"2036-03-31","underlying":"Common Stock","underlying_shares":3024},"source":{"system":"sec-edgar","filing":"0001104659-26-039309","document":"tm2610943-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1083544/000110465926039309/tm2610943-1_4seq1.xml","form_type":"4"}},{"id":833734,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":33040,"kind":"person","name":"Silva Gil Todd","position":1,"cik":"0002028266","reported_name":"Silva Gil Todd","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-03-19T23:30:07.000Z","date":"2026-03-17","kind":"purchase","planned":false,"acquired":true,"shares":2000,"price":4.2,"value":8400.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents the reporting person's open-market purchases of 2,000 shares of common stock of the issuer on March 16, 2026, and 2,000 shares of common stock of the issuer on March 17, 2026, at a price of $4.355 and $4.20 per share, respectively."}],"balance_after":4000,"source":{"system":"sec-edgar","filing":"0001104659-26-032244","document":"tm269407-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2028266/000110465926032244/tm269407-1_4seq1.xml","form_type":"4"}},{"id":833733,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":33040,"kind":"person","name":"Silva Gil Todd","position":1,"cik":"0002028266","reported_name":"Silva Gil Todd","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-03-19T23:30:07.000Z","date":"2026-03-16","kind":"purchase","planned":false,"acquired":true,"shares":2000,"price":4.355,"value":8710.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents the reporting person's open-market purchases of 2,000 shares of common stock of the issuer on March 16, 2026, and 2,000 shares of common stock of the issuer on March 17, 2026, at a price of $4.355 and $4.20 per share, respectively."}],"balance_after":2000,"source":{"system":"sec-edgar","filing":"0001104659-26-032244","document":"tm269407-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2028266/000110465926032244/tm269407-1_4seq1.xml","form_type":"4"}},{"id":873920,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":51165,"kind":"person","name":"Deller Colin James","position":1,"cik":"0001766480","reported_name":"Deller Colin James","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2026-03-03T00:01:37.000Z","date":"2026-02-26","kind":"tax_withholding","planned":false,"acquired":false,"shares":105022,"price":0.5616,"value":58980.3552,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents the payment of the reporting person's tax liability by withholding shares incident to the receipt of the Company's common stock issued on February 26, 2026, based on the closing price of the Company's common stock on February 26, 2026, of $0.5616."}],"balance_after":276874,"source":{"system":"sec-edgar","filing":"0001104659-26-022403","document":"tm267759-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465926022403/tm267759-2_4seq1.xml","form_type":"4"}},{"id":873919,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":51165,"kind":"person","name":"Deller Colin James","position":1,"cik":"0001766480","reported_name":"Deller Colin James","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2026-03-03T00:01:37.000Z","date":"2026-02-26","kind":"grant","planned":false,"acquired":true,"shares":210043,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents a one-time bonus grant to reporting person for services as an executive officer for the year ended December 31, 2025, upon achievement of certain performance target metrics approved by the human capital and compensation committee of the board of directors. The number of shares awarded is based on the closing price of the Company's common stock on February 26, 2026, of $0.5616."}],"balance_after":381896,"source":{"system":"sec-edgar","filing":"0001104659-26-022403","document":"tm267759-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465926022403/tm267759-2_4seq1.xml","form_type":"4"}},{"id":873918,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Unit","published_at":"2026-03-03T00:00:16.000Z","date":"2026-02-26","kind":"grant","planned":false,"acquired":true,"shares":47009,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Represents a one-time bonus restricted stock units (\"RSUs\") grant to reporting person for services as an executive officer for the year ended December 31, 2025, and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The RSUs granted on February 26, 2026, vest in three equal installments commencing on the first anniversary of the grant date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"The RSUs granted on February 26, 2026, vest in three equal installments commencing on the first anniversary of the grant date."}],"balance_after":47009,"derivative":{"underlying":"Common Stock","underlying_shares":47009},"source":{"system":"sec-edgar","filing":"0001104659-26-022401","document":"tm267759-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465926022401/tm267759-1_4seq1.xml","form_type":"4"}},{"id":873917,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-03-03T00:00:16.000Z","date":"2026-02-26","kind":"tax_withholding","planned":false,"acquired":false,"shares":20761,"price":0.5616,"value":11659.3776,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents the payment of the reporting person's tax liability by withholding shares incident to the receipt of the Company's common stock issued on February 26, 2026, based on the closing price of the Company's common stock on February 26, 2026, of $0.5616."}],"balance_after":170824,"source":{"system":"sec-edgar","filing":"0001104659-26-022401","document":"tm267759-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465926022401/tm267759-1_4seq1.xml","form_type":"4"}},{"id":873916,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-03-03T00:00:16.000Z","date":"2026-02-26","kind":"grant","planned":false,"acquired":true,"shares":56645,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents a one-time bonus grant to the reporting person for services as an executive officer for the year ended December 31, 2025, upon achievement of certain performance target metrics approved by the human capital and compensation committee of the board of directors. The number of shares awarded is based on the closing price of the Company's common stock on February 26, 2026, of $0.5616."}],"balance_after":191585,"source":{"system":"sec-edgar","filing":"0001104659-26-022401","document":"tm267759-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465926022401/tm267759-1_4seq1.xml","form_type":"4"}},{"id":884553,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Unit","published_at":"2026-02-25T00:00:12.000Z","date":"2026-02-22","kind":"exercise","planned":false,"acquired":false,"shares":7547,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F7","text":"On February 22, 2024, the reporting person was granted 22,641 RSUs as a one-time bonus for services as an executive officer for the year ended December 31, 2023, and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F8","text":"The RSUs granted on February 22, 2024, vest in three equal installments that commenced on February 22, 2025."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F8","text":"The RSUs granted on February 22, 2024, vest in three equal installments that commenced on February 22, 2025."}],"balance_after":7547,"derivative":{"underlying":"Common Stock","underlying_shares":7547},"source":{"system":"sec-edgar","filing":"0001104659-26-019278","document":"tm267197-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465926019278/tm267197-1_4seq1.xml","form_type":"4"}},{"id":884552,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Unit","published_at":"2026-02-25T00:00:12.000Z","date":"2026-02-20","kind":"exercise","planned":false,"acquired":false,"shares":9315,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"On February 20, 2025, the reporting person was granted 27,946 RSUs as a one-time bonus for services as an executive officer for the year ended December 31, 2024, and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"The RSUs granted on February 20, 2025, vest in three equal installments that commenced on February 20, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"The RSUs granted on February 20, 2025, vest in three equal installments that commenced on February 20, 2026."}],"balance_after":18631,"derivative":{"underlying":"Common Stock","underlying_shares":9315},"source":{"system":"sec-edgar","filing":"0001104659-26-019278","document":"tm267197-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465926019278/tm267197-1_4seq1.xml","form_type":"4"}},{"id":884551,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-02-25T00:00:12.000Z","date":"2026-02-22","kind":"tax_withholding","planned":false,"acquired":false,"shares":2765,"price":0.5949,"value":1644.8985,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F4","text":"Represents the payment of the reporting person's tax liability by withholding shares in connection with the vesting of 7,547 RSUs on February 22, 2026, and calculated based on the closing price of the Company's common stock, as reported on the Nasdaq Stock Market, on February 20, 2026, of $0.5949 (as February 22, 2026 fell on a weekend)."}],"balance_after":134940,"source":{"system":"sec-edgar","filing":"0001104659-26-019278","document":"tm267197-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465926019278/tm267197-1_4seq1.xml","form_type":"4"}},{"id":884550,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-02-25T00:00:12.000Z","date":"2026-02-22","kind":"exercise","planned":false,"acquired":true,"shares":7547,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Reflects the vesting of 7,547 RSUs out of the 22,641 RSUs granted to the reporting person on February 22, 2024, into an equal number of shares of the Company's common stock, without the payment of any consideration, pursuant to the Company's 2021 Equity Incentive Plan."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Reflects the vesting of 7,547 RSUs out of the 22,641 RSUs granted to the reporting person on February 22, 2024, into an equal number of shares of the Company's common stock, without the payment of any consideration, pursuant to the Company's 2021 Equity Incentive Plan."}],"balance_after":137705,"source":{"system":"sec-edgar","filing":"0001104659-26-019278","document":"tm267197-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465926019278/tm267197-1_4seq1.xml","form_type":"4"}},{"id":884549,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-02-25T00:00:12.000Z","date":"2026-02-20","kind":"tax_withholding","planned":false,"acquired":false,"shares":3413,"price":0.5949,"value":2030.3937,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents the payment of the reporting person's tax liability by withholding shares in connection with the vesting of 9,315 RSUs on February 20, 2026, and calculated based on the closing price of the Company's common stock, as reported on the Nasdaq Stock Market, on February 20, 2026, of $0.5949."}],"balance_after":130158,"source":{"system":"sec-edgar","filing":"0001104659-26-019278","document":"tm267197-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465926019278/tm267197-1_4seq1.xml","form_type":"4"}},{"id":884548,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-02-25T00:00:12.000Z","date":"2026-02-20","kind":"exercise","planned":false,"acquired":true,"shares":9315,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Reflects the vesting of 9,315 restricted stock units (\"RSUs\") out of the 27,946 RSUs granted to the reporting person on February 20, 2025, into an equal number of shares of the Company's common stock, without the payment of any consideration, pursuant to the Company's 2021 Equity Incentive Plan."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Reflects the vesting of 9,315 restricted stock units (\"RSUs\") out of the 27,946 RSUs granted to the reporting person on February 20, 2025, into an equal number of shares of the Company's common stock, without the payment of any consideration, pursuant to the Company's 2021 Equity Incentive Plan."}],"balance_after":133571,"source":{"system":"sec-edgar","filing":"0001104659-26-019278","document":"tm267197-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465926019278/tm267197-1_4seq1.xml","form_type":"4"}},{"id":919305,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Unit","published_at":"2026-02-04T23:00:11.000Z","date":"2026-02-02","kind":"exercise","planned":false,"acquired":false,"shares":10127,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"On February 2, 2023, the reporting person was granted 30,380 RSUs as a one-time bonus for services as an executive officer for the year ended December 31, 2022, and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The RSUs granted on February 2, 2023, vest in three equal installments that commenced on February 2, 2024."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"The RSUs granted on February 2, 2023, vest in three equal installments that commenced on February 2, 2024."}],"balance_after":10127,"derivative":{"underlying":"Common Stock","underlying_shares":10127},"source":{"system":"sec-edgar","filing":"0001104659-26-010395","document":"tm265243-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465926010395/tm265243-1_4seq1.xml","form_type":"4"}},{"id":919304,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-02-04T23:00:11.000Z","date":"2026-02-02","kind":"tax_withholding","planned":false,"acquired":false,"shares":3711,"price":0.5991,"value":2223.2601,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents the payment of the reporting person's tax liability by withholding shares in connection with the vesting of 10,127 RSUs on February 2, 2026, and calculated based on the closing price of the Company's common stock, as reported on the Nasdaq Stock Market, on February 2, 2026, of $0.5991."}],"balance_after":124256,"source":{"system":"sec-edgar","filing":"0001104659-26-010395","document":"tm265243-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465926010395/tm265243-1_4seq1.xml","form_type":"4"}},{"id":919303,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-02-04T23:00:11.000Z","date":"2026-02-02","kind":"exercise","planned":false,"acquired":true,"shares":10127,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Reflects the vesting of 10,127 restricted stock units (\"RSUs\") out of the 30,380 RSUs granted to the reporting person on February 2, 2023, into an equal number of shares of the Company's common stock, without the payment of any consideration, pursuant to the Company's 2021 Equity Incentive Plan."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Reflects the vesting of 10,127 restricted stock units (\"RSUs\") out of the 30,380 RSUs granted to the reporting person on February 2, 2023, into an equal number of shares of the Company's common stock, without the payment of any consideration, pursuant to the Company's 2021 Equity Incentive Plan."}],"balance_after":127967,"source":{"system":"sec-edgar","filing":"0001104659-26-010395","document":"tm265243-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465926010395/tm265243-1_4seq1.xml","form_type":"4"}},{"id":1024717,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":32915,"kind":"person","name":"Basenese Lou","position":1,"cik":"0001809482","reported_name":"Basenese Lou","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-10-03T22:00:59.000Z","date":"2025-10-01","kind":"grant","planned":false,"acquired":true,"shares":24621,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending December 31, 2025, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":70266,"derivative":{"underlying":"Common Stock","underlying_shares":24621},"source":{"system":"sec-edgar","filing":"0001104659-25-096764","document":"tm2527975-2_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1809482/000110465925096764/tm2527975-2_4seq1.xml","form_type":"4"}},{"id":1024955,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":33040,"kind":"person","name":"Silva Gil Todd","position":1,"cik":"0002028266","reported_name":"Silva Gil Todd","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-10-03T22:00:21.000Z","date":"2025-10-01","kind":"grant","planned":false,"acquired":true,"shares":26830,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending December 31, 2025, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":120469,"derivative":{"underlying":"Common Stock","underlying_shares":26830},"source":{"system":"sec-edgar","filing":"0001104659-25-096763","document":"tm2527975-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2028266/000110465925096763/tm2527975-1_4seq1.xml","form_type":"4"}},{"id":1092848,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":33040,"kind":"person","name":"Silva Gil Todd","position":1,"cik":"0002028266","reported_name":"Silva Gil Todd","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-07-03T22:49:52.000Z","date":"2025-07-01","kind":"grant","planned":false,"acquired":true,"shares":32638,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending September 30, 2025, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":93639,"derivative":{"underlying":"Common Stock","underlying_shares":32638},"source":{"system":"sec-edgar","filing":"0001104659-25-065884","document":"tm2519904-4_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2028266/000110465925065884/tm2519904-4_4seq1.xml","form_type":"4"}},{"id":1092224,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":77709,"kind":"person","name":"de Lacy Catharine","position":1,"cik":"0001966673","reported_name":"de Lacy Catharine","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-07-03T22:48:30.000Z","date":"2025-07-01","kind":"grant","planned":false,"acquired":true,"shares":32175,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending September 30, 2025, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":218957,"derivative":{"underlying":"Common Stock","underlying_shares":32175},"source":{"system":"sec-edgar","filing":"0001104659-25-065883","document":"tm2519904-3_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465925065883/tm2519904-3_4seq1.xml","form_type":"4"}},{"id":1092589,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":32915,"kind":"person","name":"Basenese Lou","position":1,"cik":"0001809482","reported_name":"Basenese Lou","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-07-03T22:45:45.000Z","date":"2025-07-01","kind":"grant","planned":false,"acquired":true,"shares":34722,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending September 30, 2025, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":45645,"derivative":{"underlying":"Common Stock","underlying_shares":34722},"source":{"system":"sec-edgar","filing":"0001104659-25-065881","document":"tm2519904-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1809482/000110465925065881/tm2519904-1_4seq1.xml","form_type":"4"}},{"id":1092830,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":77725,"kind":"person","name":"Maley David M","position":1,"cik":"0002021245","reported_name":"Maley David M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-07-03T18:51:19.000Z","date":"2025-07-01","kind":"grant","planned":false,"acquired":true,"shares":9452,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending September 30, 2025, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan, pro-rated for the period beginning on July 1, 2025 and ending on July 25, 2025, the reporting person's last day of service as a non-executive director, and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":105443,"derivative":{"underlying":"Common Stock","underlying_shares":9452},"source":{"system":"sec-edgar","filing":"0001104659-25-065885","document":"tm2519904-5_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2021245/000110465925065885/tm2519904-5_4seq1.xml","form_type":"4"}},{"id":1092617,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":77721,"kind":"person","name":"Schrecker Judith S","position":1,"cik":"0001850679","reported_name":"Schrecker Judith S","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-07-03T18:47:09.000Z","date":"2025-07-01","kind":"grant","planned":false,"acquired":true,"shares":46296,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending September 30, 2025, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":431957,"derivative":{"underlying":"Common Stock","underlying_shares":46296},"source":{"system":"sec-edgar","filing":"0001104659-25-065882","document":"tm2519904-2_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1850679/000110465925065882/tm2519904-2_4seq1.xml","form_type":"4"}},{"id":1133534,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":32915,"kind":"person","name":"Basenese Lou","position":1,"cik":"0001809482","reported_name":"Basenese Lou","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-05-27T23:06:12.000Z","date":"2025-05-22","kind":"grant","planned":false,"acquired":true,"shares":10923,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending June 30, 2025, on May 22, 2025, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan, pro-rated based on an appointment date of May 22, 2025, and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":10923,"derivative":{"underlying":"Common Stock","underlying_shares":10923},"source":{"system":"sec-edgar","filing":"0001104659-25-053133","document":"tm2516240-3_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1809482/000110465925053133/tm2516240-3_4seq1.xml","form_type":"4"}},{"id":1179388,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":77709,"kind":"person","name":"de Lacy Catharine","position":1,"cik":"0001966673","reported_name":"de Lacy Catharine","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-04-03T23:01:50.000Z","date":"2025-04-01","kind":"grant","planned":false,"acquired":true,"shares":24857,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending June 30, 2025, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":186782,"derivative":{"underlying":"Common Stock","underlying_shares":24857},"source":{"system":"sec-edgar","filing":"0001104659-25-031797","document":"tm2511431-4_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465925031797/tm2511431-4_4seq1.xml","form_type":"4"}},{"id":1180295,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":33040,"kind":"person","name":"Silva Gil Todd","position":1,"cik":"0002028266","reported_name":"Silva Gil Todd","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-04-03T23:00:44.000Z","date":"2025-04-01","kind":"grant","planned":false,"acquired":true,"shares":19369,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending June 30, 2025, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":61001,"derivative":{"underlying":"Common Stock","underlying_shares":19369},"source":{"system":"sec-edgar","filing":"0001104659-25-031794","document":"tm2511431-2_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2028266/000110465925031794/tm2511431-2_4seq1.xml","form_type":"4"}},{"id":1179936,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":77721,"kind":"person","name":"Schrecker Judith S","position":1,"cik":"0001850679","reported_name":"Schrecker Judith S","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-04-03T19:01:16.000Z","date":"2025-04-01","kind":"grant","planned":false,"acquired":true,"shares":33735,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending June 30, 2025, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":385661,"derivative":{"underlying":"Common Stock","underlying_shares":33735},"source":{"system":"sec-edgar","filing":"0001104659-25-031795","document":"tm2511431-3_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1850679/000110465925031795/tm2511431-3_4seq1.xml","form_type":"4"}},{"id":1180264,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":77725,"kind":"person","name":"Maley David M","position":1,"cik":"0002021245","reported_name":"Maley David M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-04-03T19:00:20.000Z","date":"2025-04-01","kind":"grant","planned":false,"acquired":true,"shares":23728,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending June 30, 2025, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":95991,"derivative":{"underlying":"Common Stock","underlying_shares":23728},"source":{"system":"sec-edgar","filing":"0001104659-25-031793","document":"tm2511431-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2021245/000110465925031793/tm2511431-1_4seq1.xml","form_type":"4"}},{"id":1245924,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Unit","published_at":"2025-02-26T00:00:29.000Z","date":"2025-02-24","kind":"exercise","planned":false,"acquired":false,"shares":7547,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"On February 22, 2024, the reporting person was granted a one-time bonus of 22,641 RSUs, and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The RSUs granted on February 22, 2024, vest in three equal annual installments that commenced on February 24, 2025."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"The RSUs granted on February 22, 2024, vest in three equal annual installments that commenced on February 24, 2025."}],"balance_after":15094,"derivative":{"underlying":"Common Stock","underlying_shares":7547},"source":{"system":"sec-edgar","filing":"0001104659-25-017042","document":"tm257605-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465925017042/tm257605-1_4seq1.xml","form_type":"4"}},{"id":1245923,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2025-02-26T00:00:29.000Z","date":"2025-02-24","kind":"tax_withholding","planned":false,"acquired":false,"shares":2636,"price":0.7994,"value":2107.2184,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents the payment of the reporting person's tax liability by withholding shares in connection with the vesting of 7,547 RSUs on February 24, 2025, and calculated based on the closing price of the Company's common stock, as reported on Nasdaq Stock Market, on February 24, 2025, of $0.7994."}],"balance_after":117840,"source":{"system":"sec-edgar","filing":"0001104659-25-017042","document":"tm257605-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465925017042/tm257605-1_4seq1.xml","form_type":"4"}},{"id":1245922,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2025-02-26T00:00:29.000Z","date":"2025-02-24","kind":"exercise","planned":false,"acquired":true,"shares":7547,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Reflects the vesting of 7,547 restricted stock units (\"RSUs\") out of the 22,641 RSUs granted to the reporting person on February 22, 2024, into an equal number of shares of the Company's common stock, without the payment of any consideration, pursuant to the Company's 2021 Equity Incentive Plan."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Reflects the vesting of 7,547 restricted stock units (\"RSUs\") out of the 22,641 RSUs granted to the reporting person on February 22, 2024, into an equal number of shares of the Company's common stock, without the payment of any consideration, pursuant to the Company's 2021 Equity Incentive Plan."}],"balance_after":120476,"source":{"system":"sec-edgar","filing":"0001104659-25-017042","document":"tm257605-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465925017042/tm257605-1_4seq1.xml","form_type":"4"}},{"id":1249400,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Unit","published_at":"2025-02-25T01:00:42.000Z","date":"2025-02-20","kind":"grant","planned":false,"acquired":true,"shares":27946,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Represents a one-time bonus restricted stock units (\"RSUs\") grant to reporting person for services as an executive officer for the year ended December 31, 2024, and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The RSUs granted on February 20, 2025, vest in three equal installments commencing on the first anniversary of the grant date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"The RSUs granted on February 20, 2025, vest in three equal installments commencing on the first anniversary of the grant date."}],"balance_after":27946,"derivative":{"underlying":"Common Stock","underlying_shares":27946},"source":{"system":"sec-edgar","filing":"0001104659-25-016631","document":"tm257462-2_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465925016631/tm257462-2_4seq1.xml","form_type":"4"}},{"id":1249399,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2025-02-25T01:00:42.000Z","date":"2025-02-20","kind":"tax_withholding","planned":false,"acquired":false,"shares":18757,"price":0.8588,"value":16108.5116,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents the payment of the reporting person's tax liability by withholding shares incident to the receipt of the Company's common stock issued on February 20, 2025, based on the closing price of the Company's common stock on February 20, 2025, of $0.8588."}],"balance_after":112929,"source":{"system":"sec-edgar","filing":"0001104659-25-016631","document":"tm257462-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465925016631/tm257462-2_4seq1.xml","form_type":"4"}},{"id":1249398,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2025-02-25T01:00:42.000Z","date":"2025-02-20","kind":"grant","planned":false,"acquired":true,"shares":51176,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents a one-time bonus grant to the reporting person for services as an executive officer for the year ended December 31, 2024. The number of shares awarded is based on the closing price of the Company's common stock on February 20, 2025, of $0.8588."}],"balance_after":131686,"source":{"system":"sec-edgar","filing":"0001104659-25-016631","document":"tm257462-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465925016631/tm257462-2_4seq1.xml","form_type":"4"}},{"id":1249397,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":51165,"kind":"person","name":"Deller Colin James","position":1,"cik":"0001766480","reported_name":"Deller Colin James","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2025-02-25T01:00:12.000Z","date":"2025-02-20","kind":"tax_withholding","planned":false,"acquired":false,"shares":49846,"price":0.8588,"value":42807.7448,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents the payment of the reporting person's tax liability by withholding shares incident to the receipt of the Company's common stock issued on February 20, 2025, based on the closing price of the Company's common stock on February 20, 2025, of $0.8588."}],"balance_after":171853,"source":{"system":"sec-edgar","filing":"0001104659-25-016630","document":"tm257462-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465925016630/tm257462-1_4seq1.xml","form_type":"4"}},{"id":1249396,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":51165,"kind":"person","name":"Deller Colin James","position":1,"cik":"0001766480","reported_name":"Deller Colin James","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2025-02-25T01:00:12.000Z","date":"2025-02-20","kind":"grant","planned":false,"acquired":true,"shares":100393,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents a one-time bonus grant to reporting person for services as an executive officer for the year ended December 31, 2024. The number of shares awarded is based on the closing price of the Company's common stock on February 20, 2025, of $0.8588."}],"balance_after":221699,"source":{"system":"sec-edgar","filing":"0001104659-25-016630","document":"tm257462-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465925016630/tm257462-1_4seq1.xml","form_type":"4"}},{"id":1252741,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Unit","published_at":"2025-02-22T00:00:39.000Z","date":"2025-02-02","kind":"exercise","planned":false,"acquired":false,"shares":10127,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F7","text":"On February 2, 2023, the reporting person was granted a one-time bonus of 30,380 RSUs, and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F8","text":"The RSUs granted on February 2, 2023, vest in three equal annual installments that commenced on February 2, 2024."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F8","text":"The RSUs granted on February 2, 2023, vest in three equal annual installments that commenced on February 2, 2024."}],"balance_after":10127,"derivative":{"underlying":"Common Stock","underlying_shares":10127},"source":{"system":"sec-edgar","filing":"0001104659-25-016240","document":"tm257346-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465925016240/tm257346-1_4seq1.xml","form_type":"4"}},{"id":1252740,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Unit","published_at":"2025-02-22T00:00:39.000Z","date":"2024-05-20","kind":"exercise","planned":false,"acquired":false,"shares":2627,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"On February 22, 2024, the reporting person was granted a one-time bonus of 2,627 PRSUs, and each PRSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"The PRSUs granted on February 22, 2024, vested on May 20, 2024, upon the achievement of certain performance targets established by the Company's compensation committee of the board of directors for the year ended December 31, 2024."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"The PRSUs granted on February 22, 2024, vested on May 20, 2024, upon the achievement of certain performance targets established by the Company's compensation committee of the board of directors for the year ended December 31, 2024."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":2627},"source":{"system":"sec-edgar","filing":"0001104659-25-016240","document":"tm257346-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465925016240/tm257346-1_4seq1.xml","form_type":"4"}},{"id":1252739,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2025-02-22T00:00:39.000Z","date":"2025-02-02","kind":"tax_withholding","planned":false,"acquired":false,"shares":3712,"price":1.2,"value":4454.4,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F4","text":"Represents the payment of the reporting person's tax liability by withholding shares in connection with the vesting of 10,127 RSUs on February 2, 2025, and calculated based on the closing price of the Company's common stock, as reported on Nasdaq Stock Market, on February 2, 2025 of $1.20."}],"balance_after":80510,"source":{"system":"sec-edgar","filing":"0001104659-25-016240","document":"tm257346-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465925016240/tm257346-1_4seq1.xml","form_type":"4"}},{"id":1252738,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2025-02-22T00:00:39.000Z","date":"2025-02-02","kind":"exercise","planned":false,"acquired":true,"shares":10127,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Reflects the vesting of 10,127 restricted stock units (\"RSUs\") out of the 30,380 RSUs granted to the reporting person on February 2, 2023, into an equal number of shares of the Company's common stock, without the payment of any consideration, pursuant to the 2021 Plan."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Reflects the vesting of 10,127 restricted stock units (\"RSUs\") out of the 30,380 RSUs granted to the reporting person on February 2, 2023, into an equal number of shares of the Company's common stock, without the payment of any consideration, pursuant to the 2021 Plan."}],"balance_after":84222,"source":{"system":"sec-edgar","filing":"0001104659-25-016240","document":"tm257346-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465925016240/tm257346-1_4seq1.xml","form_type":"4"}},{"id":1252737,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2025-02-22T00:00:39.000Z","date":"2024-05-20","kind":"tax_withholding","planned":false,"acquired":false,"shares":963,"price":0.78,"value":751.14,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents the payment of the reporting person's tax liability by withholding shares in connection with the vesting of 2,627 PRSUs on May 20, 2024, and calculated based on the closing price of the Company's common stock, as reported on Nasdaq Stock Market, on May 20, 2024 of $0.78."}],"balance_after":74095,"source":{"system":"sec-edgar","filing":"0001104659-25-016240","document":"tm257346-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465925016240/tm257346-1_4seq1.xml","form_type":"4"}},{"id":1252736,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2025-02-22T00:00:39.000Z","date":"2024-05-20","kind":"exercise","planned":false,"acquired":true,"shares":2627,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Reflects the vesting of 2,627 performance-based restricted stock units (\"PRSUs\") granted to the reporting person on February 22, 2024, into an equal number of shares of the Company's common stock, without the payment of any consideration, pursuant to the ClearSign Technologies Corporation 2021 Equity Incentive Plan (the \"2021 Plan\")."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Reflects the vesting of 2,627 performance-based restricted stock units (\"PRSUs\") granted to the reporting person on February 22, 2024, into an equal number of shares of the Company's common stock, without the payment of any consideration, pursuant to the ClearSign Technologies Corporation 2021 Equity Incentive Plan (the \"2021 Plan\")."}],"balance_after":75058,"source":{"system":"sec-edgar","filing":"0001104659-25-016240","document":"tm257346-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465925016240/tm257346-1_4seq1.xml","form_type":"4"}},{"id":1310367,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":77709,"kind":"person","name":"de Lacy Catharine","position":1,"cik":"0001966673","reported_name":"de Lacy Catharine","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-01-07T00:02:48.000Z","date":"2025-01-02","kind":"grant","planned":false,"acquired":true,"shares":13848,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending March 31, 2025, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":161925,"derivative":{"underlying":"Common Stock","underlying_shares":13848},"source":{"system":"sec-edgar","filing":"0001104659-25-001444","document":"tm252096-4_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465925001444/tm252096-4_4seq1.xml","form_type":"4"}},{"id":1311262,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":33040,"kind":"person","name":"Silva Gil Todd","position":1,"cik":"0002028266","reported_name":"Silva Gil Todd","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-01-07T00:01:55.000Z","date":"2025-01-02","kind":"grant","planned":false,"acquired":true,"shares":10791,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending March 31, 2025, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":41632,"derivative":{"underlying":"Common Stock","underlying_shares":10791},"source":{"system":"sec-edgar","filing":"0001104659-25-001443","document":"tm252096-3_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2028266/000110465925001443/tm252096-3_4seq1.xml","form_type":"4"}},{"id":1310940,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":77721,"kind":"person","name":"Schrecker Judith S","position":1,"cik":"0001850679","reported_name":"Schrecker Judith S","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-01-06T19:00:43.000Z","date":"2025-01-02","kind":"grant","planned":false,"acquired":true,"shares":18794,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending March 31, 2025, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":351926,"derivative":{"underlying":"Common Stock","underlying_shares":18794},"source":{"system":"sec-edgar","filing":"0001104659-25-001442","document":"tm252096-2_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1850679/000110465925001442/tm252096-2_4seq1.xml","form_type":"4"}},{"id":1311251,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":77725,"kind":"person","name":"Maley David M","position":1,"cik":"0002021245","reported_name":"Maley David M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-01-06T19:00:06.000Z","date":"2025-01-02","kind":"grant","planned":false,"acquired":true,"shares":13219,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending March 31, 2025, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":72263,"derivative":{"underlying":"Common Stock","underlying_shares":13219},"source":{"system":"sec-edgar","filing":"0001104659-25-001441","document":"tm252096-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2021245/000110465925001441/tm252096-1_4seq1.xml","form_type":"4"}},{"id":1392410,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":33040,"kind":"person","name":"Silva Gil Todd","position":1,"cik":"0002028266","reported_name":"Silva Gil Todd","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2024-10-03T22:01:26.000Z","date":"2024-10-01","kind":"grant","planned":false,"acquired":true,"shares":18477,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending December 31, 2024, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":30841,"derivative":{"underlying":"Common Stock","underlying_shares":18477},"source":{"system":"sec-edgar","filing":"0001104659-24-105956","document":"tm2425553-4_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2028266/000110465924105956/tm2425553-4_4seq1.xml","form_type":"4"}},{"id":1391841,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":77709,"kind":"person","name":"de Lacy Catharine","position":1,"cik":"0001966673","reported_name":"de Lacy Catharine","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2024-10-03T22:00:11.000Z","date":"2024-10-01","kind":"grant","planned":false,"acquired":true,"shares":23712,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending December 31, 2024, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":148077,"derivative":{"underlying":"Common Stock","underlying_shares":23712},"source":{"system":"sec-edgar","filing":"0001104659-24-105952","document":"tm2425553-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465924105952/tm2425553-1_4seq1.xml","form_type":"4"}},{"id":1392208,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":77721,"kind":"person","name":"Schrecker Judith S","position":1,"cik":"0001850679","reported_name":"Schrecker Judith S","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2024-10-03T18:01:02.000Z","date":"2024-10-01","kind":"grant","planned":false,"acquired":true,"shares":32181,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending December 31, 2024, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":333132,"derivative":{"underlying":"Common Stock","underlying_shares":32181},"source":{"system":"sec-edgar","filing":"0001104659-24-105955","document":"tm2425553-3_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1850679/000110465924105955/tm2425553-3_4seq1.xml","form_type":"4"}},{"id":1392402,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":77725,"kind":"person","name":"Maley David M","position":1,"cik":"0002021245","reported_name":"Maley David M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2024-10-03T18:00:36.000Z","date":"2024-10-01","kind":"grant","planned":false,"acquired":true,"shares":22634,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending December 31, 2024, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":59044,"derivative":{"underlying":"Common Stock","underlying_shares":22634},"source":{"system":"sec-edgar","filing":"0001104659-24-105953","document":"tm2425553-2_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2021245/000110465924105953/tm2425553-2_4seq1.xml","form_type":"4"}},{"id":1441084,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":33040,"kind":"person","name":"Silva Gil Todd","position":1,"cik":"0002028266","reported_name":"Silva Gil Todd","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2024-08-06T01:01:16.000Z","date":"2024-08-01","kind":"grant","planned":false,"acquired":true,"shares":12364,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending September 30, 2024, on August 1, 2024, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan, pro-rated based on an appointment date of August 1, 2024, and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":12364,"derivative":{"underlying":"Common Stock","underlying_shares":12364},"source":{"system":"sec-edgar","filing":"0001104659-24-085995","document":"tm2420897-2_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2028266/000110465924085995/tm2420897-2_4seq1.xml","form_type":"4"}},{"id":1459758,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":77709,"kind":"person","name":"de Lacy Catharine","position":1,"cik":"0001966673","reported_name":"de Lacy Catharine","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2024-07-03T22:32:00.000Z","date":"2024-07-01","kind":"grant","planned":false,"acquired":true,"shares":21872,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending September 30, 2024, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":124365,"derivative":{"underlying":"Common Stock","underlying_shares":21872},"source":{"system":"sec-edgar","filing":"0001104659-24-077857","document":"tm2418827-3_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465924077857/tm2418827-3_4seq1.xml","form_type":"4"}},{"id":1460261,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":77721,"kind":"person","name":"Schrecker Judith S","position":1,"cik":"0001850679","reported_name":"Schrecker Judith S","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2024-07-03T18:31:09.000Z","date":"2024-07-01","kind":"grant","planned":false,"acquired":true,"shares":29684,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending September 30, 2024, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":300951,"derivative":{"underlying":"Common Stock","underlying_shares":29684},"source":{"system":"sec-edgar","filing":"0001104659-24-077856","document":"tm2418827-2_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1850679/000110465924077856/tm2418827-2_4seq1.xml","form_type":"4"}},{"id":1460581,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":77725,"kind":"person","name":"Maley David M","position":1,"cik":"0002021245","reported_name":"Maley David M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2024-07-03T18:30:11.000Z","date":"2024-07-01","kind":"grant","planned":false,"acquired":true,"shares":22001,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan, consisting of (i) 20,878 RSUs as compensation for services as a non-executive director during the quarter ending September 30, 2024, and (ii) 1,123 RSUs as compensation for services as a member of certain committees of the Issuer's board of directors during the quarter ended June 30, 2024, pro-rated based on an appointment date of May 3, 2024. Each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":36410,"derivative":{"underlying":"Common Stock","underlying_shares":22001},"source":{"system":"sec-edgar","filing":"0001104659-24-077855","document":"tm2418827-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2021245/000110465924077855/tm2418827-1_4seq1.xml","form_type":"4"}},{"id":1468771,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":89505,"kind":"person","name":"HOFFMAN Robert Thurston Sr","position":1,"cik":"0001748409","reported_name":"HOFFMAN Robert Thurston Sr","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":89506,"kind":"organization","name":"clirSPV LLC","position":2,"cik":"0001747304","reported_name":"clirSPV LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":89507,"kind":"organization","name":"GPclirSPV LLC","position":3,"cik":"0001749087","reported_name":"GPclirSPV LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":89508,"kind":"organization","name":"Princeton Opportunity Management LLC","position":4,"cik":"0001749086","reported_name":"Princeton Opportunity Management LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Pre-Funded Warrants to Purchase Common Stock","published_at":"2024-06-26T20:04:00.000Z","date":"2024-06-24","kind":"purchase","planned":false,"acquired":true,"shares":1343000,"price":0.9099,"value":1221995.7,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F6","text":"The pre-funded warrants are exercisable by clirSPV at any time on or after the date of the Purchase Agreement, or June 24, 2024, until fully exercised at an exercise price per share equal to $0.0001, subject to a 19.99% beneficial ownership blocker. The pre-funded warrants have no expiration date"},{"field":"shares","element":"transactionShares","label":"F1","text":"The securities reported herein were issued to clirSPV LLC (\"clirSPV\") pursuant to a Securities Purchase Agreement, dated as of June 24, 2024, as amended on June 26, 2024 (as amended, the \"Purchase Agreement\"), by and among the Issuer and clirSPV, in connection with its participation right to purchase unregistered securities of the Issuer to maintain a 19.99% ownership percentage of the Issuer's outstanding shares of common stock on terms and conditions no different than those offered to other purchasers. Pursuant to the Purchase Agreement, the Issuer issued clirSPV an aggregate of (i) 3,350,000 shares of common stock, (ii) redeemable warrants to purchase up to 7,039,500 shares of common stock and (iii) pre-funded warrants to purchase up to 1,343,000 shares of common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"The pre-funded warrants are exercisable by clirSPV at any time on or after the date of the Purchase Agreement, or June 24, 2024, until fully exercised at an exercise price per share equal to $0.0001, subject to a 19.99% beneficial ownership blocker. The pre-funded warrants have no expiration date"},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"The pre-funded warrants are exercisable by clirSPV at any time on or after the date of the Purchase Agreement, or June 24, 2024, until fully exercised at an exercise price per share equal to $0.0001, subject to a 19.99% beneficial ownership blocker. The pre-funded warrants have no expiration date"},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Mr. Hoffman is the managing member of GPclirSPV LLC which is the managing member of clirSPV, the owner of the shares of common stock. Mr. Hoffman disclaims beneficial ownership of these shares except to the extent of his pecuniary interest in clirSPV. Mr. Hoffman has direct ownership of none of the shares of common stock purchased and a total direct beneficial ownership of 237,464 shares of common stock. clirSPV has direct ownership of 3,350,000 shares of common stock purchased and total direct beneficial ownership of 9,539,857 shares of common stock. GPclirSPV LLC has no direct ownership of the shares purchased and total indirect beneficial ownership of 9,539,857 shares of common stock. Princeton Opportunity Management LLC has no direct ownership of shares purchased and total indirect beneficial ownership of 9,539,857 shares of common stock."}],"balance_after":1343000,"derivative":{"underlying":"Common Stock","underlying_shares":1343000},"source":{"system":"sec-edgar","filing":"0001104659-24-075270","document":"tm2418369-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1748409/000110465924075270/tm2418369-1_4seq1.xml","form_type":"4"}},{"id":1468770,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":89505,"kind":"person","name":"HOFFMAN Robert Thurston Sr","position":1,"cik":"0001748409","reported_name":"HOFFMAN Robert Thurston Sr","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":89506,"kind":"organization","name":"clirSPV LLC","position":2,"cik":"0001747304","reported_name":"clirSPV LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":89507,"kind":"organization","name":"GPclirSPV LLC","position":3,"cik":"0001749087","reported_name":"GPclirSPV LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":89508,"kind":"organization","name":"Princeton Opportunity Management LLC","position":4,"cik":"0001749086","reported_name":"Princeton Opportunity Management LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Redeemable Warrants to Purchase Common Stock","published_at":"2024-06-26T20:04:00.000Z","date":"2024-06-24","kind":"purchase","planned":false,"acquired":true,"shares":7039500,"price":0.01,"value":70395.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"The redeemable warrants are exercisable by clirSPV at any time on or after six (6) months after the date of the Purchase Agreement, or December 24, 2024, until June 24, 2029 at an exercise price per share equal to $1.05, subject to a 19.99% beneficial ownership blocker."},{"field":"shares","element":"transactionShares","label":"F1","text":"The securities reported herein were issued to clirSPV LLC (\"clirSPV\") pursuant to a Securities Purchase Agreement, dated as of June 24, 2024, as amended on June 26, 2024 (as amended, the \"Purchase Agreement\"), by and among the Issuer and clirSPV, in connection with its participation right to purchase unregistered securities of the Issuer to maintain a 19.99% ownership percentage of the Issuer's outstanding shares of common stock on terms and conditions no different than those offered to other purchasers. Pursuant to the Purchase Agreement, the Issuer issued clirSPV an aggregate of (i) 3,350,000 shares of common stock, (ii) redeemable warrants to purchase up to 7,039,500 shares of common stock and (iii) pre-funded warrants to purchase up to 1,343,000 shares of common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The redeemable warrants are exercisable by clirSPV at any time on or after six (6) months after the date of the Purchase Agreement, or December 24, 2024, until June 24, 2029 at an exercise price per share equal to $1.05, subject to a 19.99% beneficial ownership blocker."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"The redeemable warrants are exercisable by clirSPV at any time on or after six (6) months after the date of the Purchase Agreement, or December 24, 2024, until June 24, 2029 at an exercise price per share equal to $1.05, subject to a 19.99% beneficial ownership blocker."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Mr. Hoffman is the managing member of GPclirSPV LLC which is the managing member of clirSPV, the owner of the shares of common stock. Mr. Hoffman disclaims beneficial ownership of these shares except to the extent of his pecuniary interest in clirSPV. Mr. Hoffman has direct ownership of none of the shares of common stock purchased and a total direct beneficial ownership of 237,464 shares of common stock. clirSPV has direct ownership of 3,350,000 shares of common stock purchased and total direct beneficial ownership of 9,539,857 shares of common stock. GPclirSPV LLC has no direct ownership of the shares purchased and total indirect beneficial ownership of 9,539,857 shares of common stock. Princeton Opportunity Management LLC has no direct ownership of shares purchased and total indirect beneficial ownership of 9,539,857 shares of common stock."}],"balance_after":7039500,"derivative":{"underlying":"Common Stock","underlying_shares":7039500},"source":{"system":"sec-edgar","filing":"0001104659-24-075270","document":"tm2418369-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1748409/000110465924075270/tm2418369-1_4seq1.xml","form_type":"4"}},{"id":1468769,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":89505,"kind":"person","name":"HOFFMAN Robert Thurston Sr","position":1,"cik":"0001748409","reported_name":"HOFFMAN Robert Thurston Sr","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":89506,"kind":"organization","name":"clirSPV LLC","position":2,"cik":"0001747304","reported_name":"clirSPV LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":89507,"kind":"organization","name":"GPclirSPV LLC","position":3,"cik":"0001749087","reported_name":"GPclirSPV LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":89508,"kind":"organization","name":"Princeton Opportunity Management LLC","position":4,"cik":"0001749086","reported_name":"Princeton Opportunity Management LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2024-06-26T20:04:00.000Z","date":"2024-06-24","kind":"purchase","planned":false,"acquired":true,"shares":3350000,"price":0.91,"value":3048500.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The securities reported herein were issued to clirSPV LLC (\"clirSPV\") pursuant to a Securities Purchase Agreement, dated as of June 24, 2024, as amended on June 26, 2024 (as amended, the \"Purchase Agreement\"), by and among the Issuer and clirSPV, in connection with its participation right to purchase unregistered securities of the Issuer to maintain a 19.99% ownership percentage of the Issuer's outstanding shares of common stock on terms and conditions no different than those offered to other purchasers. Pursuant to the Purchase Agreement, the Issuer issued clirSPV an aggregate of (i) 3,350,000 shares of common stock, (ii) redeemable warrants to purchase up to 7,039,500 shares of common stock and (iii) pre-funded warrants to purchase up to 1,343,000 shares of common stock."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Mr. Hoffman is the managing member of GPclirSPV LLC which is the managing member of clirSPV, the owner of the shares of common stock. Mr. Hoffman disclaims beneficial ownership of these shares except to the extent of his pecuniary interest in clirSPV. Mr. Hoffman has direct ownership of none of the shares of common stock purchased and a total direct beneficial ownership of 237,464 shares of common stock. clirSPV has direct ownership of 3,350,000 shares of common stock purchased and total direct beneficial ownership of 9,539,857 shares of common stock. GPclirSPV LLC has no direct ownership of the shares purchased and total indirect beneficial ownership of 9,539,857 shares of common stock. Princeton Opportunity Management LLC has no direct ownership of shares purchased and total indirect beneficial ownership of 9,539,857 shares of common stock."}],"balance_after":9539857,"source":{"system":"sec-edgar","filing":"0001104659-24-075270","document":"tm2418369-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1748409/000110465924075270/tm2418369-1_4seq1.xml","form_type":"4"}},{"id":1535553,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":77725,"kind":"person","name":"Maley David M","position":1,"cik":"0002021245","reported_name":"Maley David M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2024-04-25T17:01:41.000Z","date":"2024-04-23","kind":"grant","planned":false,"acquired":true,"shares":14409,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending June 30, 2024, on April 23, 2024, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan, pro-rated based on an appointment date of April 23, 2024, and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":14409,"derivative":{"underlying":"Common Stock","underlying_shares":14409},"source":{"system":"sec-edgar","filing":"0001104659-24-052051","document":"tm2412715-2_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2021245/000110465924052051/tm2412715-2_4seq1.xml","form_type":"4"}},{"id":1543674,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Unit","published_at":"2024-04-10T21:00:31.000Z","date":"2024-02-22","kind":"grant","planned":false,"acquired":true,"shares":22641,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Represents a one-time bonus restricted stock unit (\"RSUs\") grant to reporting person for services as an executive officer for the year ended December 31, 2023, and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs granted on February 22, 2024 vest in three equal installments commencing on the first anniversary of the grant date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs granted on February 22, 2024 vest in three equal installments commencing on the first anniversary of the grant date."}],"balance_after":22641,"derivative":{"underlying":"Common Stock","underlying_shares":22641},"source":{"system":"sec-edgar","filing":"0001104659-24-045881","document":"tm2411542-1_4aseq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465924045881/tm2411542-1_4aseq1.xml","form_type":"4/A","original_submission_date":"2024-02-26"}},{"id":1553314,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":77709,"kind":"person","name":"de Lacy Catharine","position":1,"cik":"0001966673","reported_name":"de Lacy Catharine","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2024-04-02T21:32:22.000Z","date":"2024-04-01","kind":"grant","planned":false,"acquired":true,"shares":19642,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending June 30, 2024, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":102493,"derivative":{"underlying":"Common Stock","underlying_shares":19642},"source":{"system":"sec-edgar","filing":"0001104659-24-042667","document":"tm2410636-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465924042667/tm2410636-1_4seq1.xml","form_type":"4"}},{"id":1553856,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":77721,"kind":"person","name":"Schrecker Judith S","position":1,"cik":"0001850679","reported_name":"Schrecker Judith S","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2024-04-02T17:36:39.000Z","date":"2024-04-01","kind":"grant","planned":false,"acquired":true,"shares":26658,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending June 30, 2024, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":271267,"derivative":{"underlying":"Common Stock","underlying_shares":26658},"source":{"system":"sec-edgar","filing":"0001104659-24-042671","document":"tm2410636-3_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1850679/000110465924042671/tm2410636-3_4seq1.xml","form_type":"4"}},{"id":1553725,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":89505,"kind":"person","name":"HOFFMAN Robert Thurston Sr","position":1,"cik":"0001748409","reported_name":"HOFFMAN Robert Thurston Sr","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2024-04-02T17:34:21.000Z","date":"2024-04-01","kind":"grant","planned":false,"acquired":true,"shares":20408,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending June 30, 2024, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":224311,"derivative":{"underlying":"Common Stock","underlying_shares":20408},"source":{"system":"sec-edgar","filing":"0001104659-24-042669","document":"tm2410636-2_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1748409/000110465924042669/tm2410636-2_4seq1.xml","form_type":"4"}},{"id":1619197,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Unit","published_at":"2024-02-26T22:03:34.000Z","date":"2024-02-22","kind":"grant","planned":false,"acquired":true,"shares":2627,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Represents a one-time bonus performance-based RSU (\"PRSUs\") grant to the reporting person, and each PRSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"The PRSUs granted on February 22, 2024 will fully vest upon the achievement of certain performance targets established by the Company's compensation committee of the board of directors for the year ending December 31, 2024. If the reporting person does not achieve the established performance targets, which will be measured over the year ending December 31, 2024, the PRSUs will not vest and will be forfeited."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"The PRSUs granted on February 22, 2024 will fully vest upon the achievement of certain performance targets established by the Company's compensation committee of the board of directors for the year ending December 31, 2024. If the reporting person does not achieve the established performance targets, which will be measured over the year ending December 31, 2024, the PRSUs will not vest and will be forfeited."}],"balance_after":2627,"derivative":{"underlying":"Common Stock","underlying_shares":2627},"source":{"system":"sec-edgar","filing":"0001104659-24-027584","document":"tm247292-3_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465924027584/tm247292-3_4seq1.xml","form_type":"4"}},{"id":1619196,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Unit","published_at":"2024-02-26T22:03:34.000Z","date":"2024-02-22","kind":"grant","planned":false,"acquired":true,"shares":7547,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Represents a one-time bonus restricted stock unit (\"RSUs\") grant to reporting person for services as an executive officer for the year ended December 31, 2023, and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The RSUs granted on February 22, 2024 vest in three equal installments commencing on the first anniversary of the grant date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"The RSUs granted on February 22, 2024 vest in three equal installments commencing on the first anniversary of the grant date."}],"balance_after":7547,"derivative":{"underlying":"Common Stock","underlying_shares":7547},"source":{"system":"sec-edgar","filing":"0001104659-24-027584","document":"tm247292-3_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465924027584/tm247292-3_4seq1.xml","form_type":"4"}},{"id":1619195,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2024-02-26T22:03:34.000Z","date":"2024-02-22","kind":"tax_withholding","planned":false,"acquired":false,"shares":16520,"price":1.06,"value":17511.2,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents the payment of the reporting person's tax liability by withholding shares incident to the receipt of the Company's common stock issued on February 22, 2024 based on the closing price of the Company's common stock on February 22, 2024 of $1.06."}],"balance_after":72431,"source":{"system":"sec-edgar","filing":"0001104659-24-027584","document":"tm247292-3_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465924027584/tm247292-3_4seq1.xml","form_type":"4"}},{"id":1619194,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2024-02-26T22:03:34.000Z","date":"2024-02-22","kind":"grant","planned":false,"acquired":true,"shares":45075,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents a one-time bonus grant to the reporting person for services as an executive officer for the year ended December 31, 2023. The number of shares awarded is based on the closing price of the Company's common stock on February 22, 2024 of $1.06."}],"balance_after":88951,"source":{"system":"sec-edgar","filing":"0001104659-24-027584","document":"tm247292-3_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465924027584/tm247292-3_4seq1.xml","form_type":"4"}},{"id":1619193,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2024-02-26T22:01:57.000Z","date":"2023-02-02","kind":"tax_withholding","planned":false,"acquired":false,"shares":21673,"price":0.79,"value":17121.67,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On February 14, 2023, the reporting person filed a Form 4 reporting the receipt of 59,135 shares of the Company's common stock as a one-time bonus for services as an executive officer for the year ended December 31, 2022 (the \"Original Form 4\"). This amendment is being filed to report the withholding of shares as payment of tax liability incident to the February 2, 2023 receipt of the Company's common stock and to correct the number of securities beneficially owned following the transaction as reported in Column 5 of the Original Form 4. The number of shares withheld is based on the closing price of the Company's common stock on February 2, 2023 of $0.79."}],"balance_after":37462,"source":{"system":"sec-edgar","filing":"0001104659-24-027577","document":"tm247292-4_4aseq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465924027577/tm247292-4_4aseq1.xml","form_type":"4/A","original_submission_date":"2023-02-14"}},{"id":1619192,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":51165,"kind":"person","name":"Deller Colin James","position":1,"cik":"0001766480","reported_name":"Deller Colin James","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2024-02-26T22:01:08.000Z","date":"2024-02-22","kind":"tax_withholding","planned":false,"acquired":false,"shares":65102,"price":1.06,"value":69008.12,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents the payment of the reporting person's tax liability by withholding shares incident to the receipt of the Company's common stock issued on February 22, 2024 based on the closing price of the Company's common stock on February 22, 2024 of $1.06."}],"balance_after":121306,"source":{"system":"sec-edgar","filing":"0001104659-24-027573","document":"tm247292-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465924027573/tm247292-1_4seq1.xml","form_type":"4"}},{"id":1619191,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":51165,"kind":"person","name":"Deller Colin James","position":1,"cik":"0001766480","reported_name":"Deller Colin James","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2024-02-26T22:01:08.000Z","date":"2024-02-22","kind":"grant","planned":false,"acquired":true,"shares":131121,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents a one-time bonus grant to reporting person for services as an executive officer for the year ended December 31, 2023. The number of shares awarded is based on the closing price of the Company's common stock on February 22, 2024 of $1.06."}],"balance_after":186408,"source":{"system":"sec-edgar","filing":"0001104659-24-027573","document":"tm247292-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465924027573/tm247292-1_4seq1.xml","form_type":"4"}},{"id":1619190,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":51165,"kind":"person","name":"Deller Colin James","position":1,"cik":"0001766480","reported_name":"Deller Colin James","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2024-02-26T22:00:37.000Z","date":"2023-02-02","kind":"tax_withholding","planned":false,"acquired":false,"shares":54519,"price":0.79,"value":43070.01,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On February 14, 2023, the reporting person filed a Form 4 reporting the receipt of 109,806 shares of the Company's common stock as a one-time bonus for services as an executive officer for the year ended December 31, 2022 (the \"Original Form 4\"). This amendment is being filed to report the withholding of shares as payment of tax liability incident to the February 2, 2023 receipt of the Company's common stock and to correct the number of securities beneficially owned following the transaction as reported in Column 5 of the Original Form 4. The number of shares withheld is based on the closing price of the Company's common stock on February 2, 2023 of $0.79."}],"balance_after":55287,"source":{"system":"sec-edgar","filing":"0001104659-24-027566","document":"tm247292-2_4aseq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465924027566/tm247292-2_4aseq1.xml","form_type":"4/A","original_submission_date":"2023-02-14"}},{"id":1656717,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Unit","published_at":"2024-02-06T21:45:38.000Z","date":"2024-02-02","kind":"exercise","planned":false,"acquired":false,"shares":10126,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"On February 2, 2023, the reporting person was granted 30,380 RSUs as a one-time bonus for services as an executive officer for the year ended December 31, 2022, and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"shares","element":"transactionShares","label":"F1","text":"Represents the vesting of 10,126 restricted stock units (\"RSUs\")."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The RSUs granted on February 2, 2023 vest in three equal annual installments commencing on the first anniversary of the grant date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"The RSUs granted on February 2, 2023 vest in three equal annual installments commencing on the first anniversary of the grant date."}],"balance_after":20254,"derivative":{"underlying":"Common Stock","underlying_shares":10126},"source":{"system":"sec-edgar","filing":"0001104659-24-011141","document":"tm245384-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465924011141/tm245384-1_4seq1.xml","form_type":"4"}},{"id":1656716,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2024-02-06T21:45:38.000Z","date":"2024-02-02","kind":"tax_withholding","planned":false,"acquired":false,"shares":3712,"price":1.01,"value":3749.12,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Represents the payment of the reporting person's tax liability by withholding shares incident to the vesting of the RSUs that vested on February 2, 2024."}],"balance_after":65549,"source":{"system":"sec-edgar","filing":"0001104659-24-011141","document":"tm245384-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465924011141/tm245384-1_4seq1.xml","form_type":"4"}},{"id":1656715,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":63931,"kind":"person","name":"Hinds Brent","position":1,"cik":"0001888082","reported_name":"Hinds Brent","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2024-02-06T21:45:38.000Z","date":"2024-02-02","kind":"exercise","planned":false,"acquired":true,"shares":10126,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents the vesting of 10,126 restricted stock units (\"RSUs\")."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"RSUs convert to common stock on a one-for-one basis."}],"balance_after":69261,"source":{"system":"sec-edgar","filing":"0001104659-24-011141","document":"tm245384-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465924011141/tm245384-1_4seq1.xml","form_type":"4"}},{"id":1661856,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":89505,"kind":"person","name":"HOFFMAN Robert Thurston Sr","position":1,"cik":"0001748409","reported_name":"HOFFMAN Robert Thurston Sr","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":89506,"kind":"organization","name":"clirSPV LLC","position":2,"cik":"0001747304","reported_name":"clirSPV LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":89507,"kind":"organization","name":"GPclirSPV LLC","position":3,"cik":"0001749087","reported_name":"GPclirSPV LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":89508,"kind":"organization","name":"Princeton Opportunity Management LLC","position":4,"cik":"0001749086","reported_name":"Princeton Opportunity Management LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock (CLIR)","published_at":"2024-02-02T18:58:33.000Z","date":"2024-02-01","kind":"other","planned":false,"acquired":false,"shares":1269705,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Note"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Note: clirSPV LLC distributed 1,269,705 shares of ClearSign Technologies Corp. to certain of its members. To the knowledge of Mr. Hoffman, none of such members holds 5% or more of the Common Stock of ClearSign Technologies Corp. after such distribution."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Note: Mr. Hoffman is the managing member of GPclirSPV LLC which is the managing member of clirSPV LLC, the owner of the common stock. Mr. Hoffman disclaims beneficial ownership of these shares except to the extent of his pecuniary interest in clirSPV LLC. clirSPV LLC has distributed 1,269,705 shares of ClearSign Technologies Corp. to certain of its members pursuant to their rights to cause such distributions. clirSPV LLC has direct ownership of 6,189,857 shares of Common Stock. GPclirSPV, LLC has no direct ownership of the shares purchased and total indirect beneficial ownership of 6,189,857 shares of Common Stock. Princeton Opportunity Management LLC has no direct ownership of shares purchased and total indirect beneficial ownership of 6,189,857 shares of Common Stock"}],"balance_after":6189857,"source":{"system":"sec-edgar","filing":"0001014108-24-000005","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1748409/000101410824000005/primary_doc.xml","form_type":"4"}},{"id":1692002,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":77709,"kind":"person","name":"de Lacy Catharine","position":1,"cik":"0001966673","reported_name":"de Lacy Catharine","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2024-01-03T21:30:31.000Z","date":"2024-01-02","kind":"grant","planned":false,"acquired":true,"shares":17990,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending March 31, 2024, the reporting person was granted restricted stock units\n(\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or\nthe cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's\nDisability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's\nDisability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":82851,"derivative":{"underlying":"Common Stock","underlying_shares":17990},"source":{"system":"sec-edgar","filing":"0001104659-24-000863","document":"tm241812-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465924000863/tm241812-1_4seq1.xml","form_type":"4"}},{"id":1693061,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":77721,"kind":"person","name":"Schrecker Judith S","position":1,"cik":"0001850679","reported_name":"Schrecker Judith S","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2024-01-03T16:31:47.000Z","date":"2024-01-02","kind":"grant","planned":false,"acquired":true,"shares":24415,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending March 31, 2024, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":244609,"derivative":{"underlying":"Common Stock","underlying_shares":24415},"source":{"system":"sec-edgar","filing":"0001104659-24-000874","document":"tm241812-3_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1850679/000110465924000874/tm241812-3_4seq1.xml","form_type":"4"}},{"id":1692749,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":89505,"kind":"person","name":"HOFFMAN Robert Thurston Sr","position":1,"cik":"0001748409","reported_name":"HOFFMAN Robert Thurston Sr","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2024-01-03T16:31:04.000Z","date":"2024-01-02","kind":"grant","planned":false,"acquired":true,"shares":18691,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending March 31, 2024, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":203903,"derivative":{"underlying":"Common Stock","underlying_shares":18691},"source":{"system":"sec-edgar","filing":"0001104659-24-000871","document":"tm241812-2_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1748409/000110465924000871/tm241812-2_4seq1.xml","form_type":"4"}},{"id":1765184,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":77709,"kind":"person","name":"de Lacy Catharine","position":1,"cik":"0001966673","reported_name":"de Lacy Catharine","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2023-10-04T21:47:01.000Z","date":"2023-10-02","kind":"grant","planned":false,"acquired":true,"shares":18333,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending December 31, 2023, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":64861,"derivative":{"underlying":"Common Stock","underlying_shares":18333},"source":{"system":"sec-edgar","filing":"0001104659-23-106901","document":"tm2327697-4_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465923106901/tm2327697-4_4seq1.xml","form_type":"4"}},{"id":1765183,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":109211,"kind":"person","name":"DiElsi Gary J.","position":1,"cik":"0001939971","reported_name":"DiElsi Gary J.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2023-10-04T21:25:25.000Z","date":"2023-10-02","kind":"grant","planned":false,"acquired":true,"shares":18571,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending December 31, 2023, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":115993,"derivative":{"underlying":"Common Stock","underlying_shares":18571},"source":{"system":"sec-edgar","filing":"0001104659-23-106892","document":"tm2327697-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465923106892/tm2327697-1_4seq1.xml","form_type":"4"}},{"id":1765470,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":77721,"kind":"person","name":"Schrecker Judith S","position":1,"cik":"0001850679","reported_name":"Schrecker Judith S","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2023-10-04T17:40:35.000Z","date":"2023-10-02","kind":"grant","planned":false,"acquired":true,"shares":23809,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending December 31, 2023, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":220194,"derivative":{"underlying":"Common Stock","underlying_shares":23809},"source":{"system":"sec-edgar","filing":"0001104659-23-106899","document":"tm2327697-3_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1850679/000110465923106899/tm2327697-3_4seq1.xml","form_type":"4"}},{"id":1765389,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":89505,"kind":"person","name":"HOFFMAN Robert Thurston Sr","position":1,"cik":"0001748409","reported_name":"HOFFMAN Robert Thurston Sr","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2023-10-04T17:30:26.000Z","date":"2023-10-02","kind":"grant","planned":false,"acquired":true,"shares":19047,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending December 31, 2023, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":185212,"derivative":{"underlying":"Common Stock","underlying_shares":19047},"source":{"system":"sec-edgar","filing":"0001104659-23-106894","document":"tm2327697-2_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1748409/000110465923106894/tm2327697-2_4seq1.xml","form_type":"4"}},{"id":1833699,"issuer":{"id":7487,"kind":"organization","name":"ClearSign Technologies Corp","symbol":"CLIR"},"owners":[{"id":77709,"kind":"person","name":"de Lacy Catharine","position":1,"cik":"0001966673","reported_name":"de Lacy Catharine","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2023-07-06T20:05:43.000Z","date":"2023-07-03","kind":"grant","planned":false,"acquired":true,"shares":13602,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"As compensation for services as a non-executive director during the quarter ending September 30, 2023, the reporting person was granted restricted stock units (\"RSUs\") under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service."}],"balance_after":46528,"derivative":{"underlying":"Common Stock","underlying_shares":13602},"source":{"system":"sec-edgar","filing":"0001104659-23-078724","document":"tm2320744-4_4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1434524/000110465923078724/tm2320744-4_4.xml","form_type":"4"}}],"next_cursor":"2023-07-06T20:05:43.000000Z,1833699"}