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The RSUs become payable in Common Stock in accordance with a deferral election made by the reporting person."},{"field":"shares","element":"transactionShares","label":"F2","text":"The number of shares subject to and issuable under the award is determined on the last day of each calendar quarter during the period April 1, 2024 through March 31, 2025 (beginning with the quarter ending June 30, 2024) by dividing $27,500 by the fair market value per share of Common Stock, which was determined to be $1.64 on March 31, 2025, rounded down to the nearest whole share."},{"field":"shares","element":"transactionShares","label":"F3","text":"The RSUs will vest on March 31, 2025 subject to continued service through such date."},{"field":"shares","element":"transactionShares","label":"F4","text":"No expiration date is applicable to restricted stock units."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"Mr. Lee's previously filed Form 4 included 800,000 private placement warrants, currently held, but not yet exercised, in Mr. Lee's beneficially owned securities, which are now removed in this Form 4."}],"balance_after":1003277,"source":{"system":"sec-edgar","filing":"0000929638-25-001447","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1851961/000092963825001447/form4.xml","form_type":"4"}},{"id":1183751,"issuer":{"id":6473,"kind":"organization","name":"GCT Semiconductor Holding, Inc.","symbol":"GCTS"},"owners":[{"id":689,"kind":"person","name":"TUDER JEFFREY","position":1,"cik":"0001671976","reported_name":"TUDER JEFFREY","relationship":{"director":true,"other":true,"other_text":"Class III Director"}}],"security":"Common Stock","published_at":"2025-04-02T20:06:44.000Z","date":"2025-03-31","kind":"grant","planned":false,"acquired":true,"shares":16768,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each Restricted Stock Unit (\"RSU\") represents the right to receive one share of common stock, par value $0.0001 per share (\"Common Stock\") of GCT Semiconductor Holding, Inc. 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The RSUs become payable in Common Stock in accordance with a deferral election made by the reporting person."},{"field":"shares","element":"transactionShares","label":"F2","text":"The number of shares subject to and issuable under the award is determined on the last day of each calendar quarter during the period April 1, 2024 through March 31, 2025 (beginning with the quarter ending June 30, 2024) by dividing $27,500 by the fair market value per share of Common Stock, which was determined to be $1.64 on March 31, 2025, rounded down to the nearest whole share."},{"field":"shares","element":"transactionShares","label":"F3","text":"The RSUs will vest on March 31, 2025 subject to continued service through such date."},{"field":"shares","element":"transactionShares","label":"F4","text":"No expiration date is applicable to restricted stock units."}],"balance_after":42056,"source":{"system":"sec-edgar","filing":"0000929638-25-001446","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1851961/000092963825001446/form4.xml","form_type":"4"}},{"id":1183750,"issuer":{"id":6473,"kind":"organization","name":"GCT Semiconductor Holding, Inc.","symbol":"GCTS"},"owners":[{"id":851,"kind":"person","name":"Chan Nelson","position":1,"cik":"0001242653","reported_name":"Chan Nelson","relationship":{"director":true,"other":true,"other_text":"Class I Director"}}],"security":"Common Stock","published_at":"2025-04-02T20:05:36.000Z","date":"2025-03-31","kind":"grant","planned":false,"acquired":true,"shares":16768,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents Restricted Stock Units (\"RSUs\") acquired pursuant to the terms of the GCT Semiconductor Holding, Inc. 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Each RSU represents the right to receive one share of common stock, par value $0.0001 per share (\"Common Stock\") of the Issuer following vesting."},{"field":"shares","element":"transactionShares","label":"F2","text":"The number of shares subject to and issuable under the award is determined on the last day of each calendar quarter during the period April 1, 2024 through March 31, 2025 (beginning with the quarter ending June 30, 2024) by dividing $27,500 by the fair market value per share of Common Stock, which was determined to be $1.64 on March 31, 2025, rounded down to the nearest whole share."},{"field":"shares","element":"transactionShares","label":"F3","text":"The RSU's will vest on March 31, 2025, subject to continued service through such date."},{"field":"shares","element":"transactionShares","label":"F4","text":"No expiration date is applicable to restricted stock units."}],"balance_after":42056,"source":{"system":"sec-edgar","filing":"0000929638-25-001445","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1851961/000092963825001445/form4.xml","form_type":"4"}},{"id":1188904,"issuer":{"id":6473,"kind":"organization","name":"GCT Semiconductor Holding, Inc.","symbol":"GCTS"},"owners":[{"id":81441,"kind":"organization","name":"Concord Sponsor Group III LLC","position":1,"cik":"0001891676","reported_name":"Concord Sponsor Group III LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Warrant","published_at":"2025-03-28T20:00:15.000Z","date":"2025-03-26","kind":"other","planned":false,"acquired":false,"shares":3948086,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Pro rata distribution from the Reporting Person to its members."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The securities are held directly by the Reporting Person. The Reporting Person is governed by a board of managers consisting of three managers, Bob Diamond, David Schamis and Tim Kacani. Any action by the Reporting Person with respect to the issuer or the issuer's securities held by the Reporting Person, including voting and dispositive decisions, requires at least a majority vote of the managers of the board of managers. Under the so-called \"rule of three\", because voting and dispositive decisions are made by a majority of the managers, none of the managers is deemed to be a beneficial owner of issuer's securities held by the Reporting Person, even those in which such manager holds a pecuniary interest. Accordingly, none of the managers on the Reporting Person's board of managers is deemed to have or share beneficial ownership of the founder shares held by the Reporting Person."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"These warrants became exercisable 30 days after the closing of the business combination (the \"Closing\"), on March 26, 2024, by and among the Issuer, Gibraltar Merger Sub Inc., a Delaware corporation, and GCT Semiconductors, Inc., a Delaware corporation, pursuant to a business combination agreement entered into on November 2, 2023, and will expire five years after the Closing."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"These warrants became exercisable 30 days after the closing of the business combination (the \"Closing\"), on March 26, 2024, by and among the Issuer, Gibraltar Merger Sub Inc., a Delaware corporation, and GCT Semiconductors, Inc., a Delaware corporation, pursuant to a business combination agreement entered into on November 2, 2023, and will expire five years after the Closing."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"Includes 532,190 shares of common stock that are subject to forfeiture on March 26, 2029 if the volume weighted average price of the Issuer's common stock does not trade above certain specified prices for any 20 trading day period within a period of 30 consecutive trading days prior to such date."}],"balance_after":0,"derivative":{"exercise_price":11.5,"underlying":"Common Stock","underlying_shares":3948086},"source":{"system":"sec-edgar","filing":"0001104659-25-029344","document":"tm2510715-3_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1851961/000110465925029344/tm2510715-3_4seq1.xml","form_type":"4"}},{"id":1188903,"issuer":{"id":6473,"kind":"organization","name":"GCT Semiconductor Holding, Inc.","symbol":"GCTS"},"owners":[{"id":81441,"kind":"organization","name":"Concord Sponsor Group III LLC","position":1,"cik":"0001891676","reported_name":"Concord Sponsor Group III LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-03-28T20:00:15.000Z","date":"2025-03-26","kind":"other","planned":false,"acquired":false,"shares":3101241,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Pro rata distribution from the Reporting Person to its members."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Pro rata distribution from the Reporting Person to its members."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 532,190 shares of common stock that are subject to forfeiture on March 26, 2029 if the volume weighted average price of the Issuer's common stock does not trade above certain specified prices for any 20 trading day period within a period of 30 consecutive trading days prior to such date."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"The securities are held directly by the Reporting Person. The Reporting Person is governed by a board of managers consisting of three managers, Bob Diamond, David Schamis and Tim Kacani. Any action by the Reporting Person with respect to the issuer or the issuer's securities held by the Reporting Person, including voting and dispositive decisions, requires at least a majority vote of the managers of the board of managers. Under the so-called \"rule of three\", because voting and dispositive decisions are made by a majority of the managers, none of the managers is deemed to be a beneficial owner of issuer's securities held by the Reporting Person, even those in which such manager holds a pecuniary interest. 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Business Combination Agreement, at the Effective Time, each outstanding option to purchase shares of GCT common stock was assumed and converted into an option to purchase shares of common stock of the Issuer with the same terms and conditions as were applicable to such option immediately prior to the Effective Time, subject to the applicable exchange ratio."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The option vests with respect to (i) twenty-five percent (25%) of the shares upon completion of one (1) year of service measured from January 1, 2018 and (ii) the balance of the shares subject to the option in a series of thirty-six (36) successive equal monthly installments upon completion of each additional month of service over the thirty-six (36) month period measured from January 1, 2019."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F8","text":"This amendment is being filed by the Reporting Person solely to amend the Form 4 filed on March 26, 2024 to correct the reported expiration date of stock options following the transactions previously reported on March 26, 2024."}],"balance_after":28191,"derivative":{"exercise_price":0.11,"expiration_date":"2028-03-14","underlying":"Common Stock","underlying_shares":28191},"source":{"system":"sec-edgar","filing":"0000929638-25-000894","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1851961/000092963825000894/form4.xml","form_type":"4/A","original_submission_date":"2024-03-26"}},{"id":1240930,"issuer":{"id":6473,"kind":"organization","name":"GCT Semiconductor Holding, Inc.","symbol":"GCTS"},"owners":[{"id":74840,"kind":"person","name":"Schlaefer John","position":1,"cik":"0001542775","reported_name":"Schlaefer John","relationship":{"director":true,"officer":true,"officer_title":"President, CEO & Class III Dir"}}],"security":"Stock Option (Right to 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completion of each additional month of service over the thirty-six (36) month period measured from January 1, 2016."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F8","text":"This amendment is being filed by the Reporting Person solely to amend the Form 4 filed on March 26, 2024 to correct the reported expiration date of stock options following the transactions previously reported on March 26, 2024."}],"balance_after":35669,"derivative":{"exercise_price":0.11,"expiration_date":"2025-02-23","underlying":"Common Stock","underlying_shares":35669},"source":{"system":"sec-edgar","filing":"0000929638-25-000894","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1851961/000092963825000894/form4.xml","form_type":"4/A","original_submission_date":"2024-03-26"}},{"id":1240929,"issuer":{"id":6473,"kind":"organization","name":"GCT Semiconductor Holding, 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Pursuant to the Business Combination Agreement, at the Effective Time (as defined in the Business Combination Agreement), each award of restricted stock units relating to a share of GCT common stock granted under GCT's existing equity plans was automatically converted into an award of restricted stock units covering the number of shares of the common stock of the Issuer in the manner set forth in the Business Combination Agreement. The shares subject to RSUs reported herein will vest in equal annual installments over a four (4) year period measured from December 11, 2023."}],"balance_after":12804,"source":{"system":"sec-edgar","filing":"0000929638-25-000894","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1851961/000092963825000894/form4.xml","form_type":"4/A","original_submission_date":"2024-03-26"}},{"id":1240928,"issuer":{"id":6473,"kind":"organization","name":"GCT Semiconductor Holding, Inc.","symbol":"GCTS"},"owners":[{"id":74840,"kind":"person","name":"Schlaefer John","position":1,"cik":"0001542775","reported_name":"Schlaefer John","relationship":{"director":true,"officer":true,"officer_title":"President, CEO & Class III Dir"}}],"security":"Common Stock, par value $0.0001 per share","published_at":"2025-02-27T21:01:50.000Z","date":"2024-03-26","kind":"grant","planned":false,"acquired":true,"shares":78700,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Pursuant to the Business Combination Agreement, dated as of November 2, 2023 (the \"Business Combination Agreement\"), by and among Concord Acquisition Corp III, Gibraltar Merger Sub Inc., and GCT Semiconductor, Inc. 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