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These shares are reflected on Table I, and 80,000 units remaining subject to these performance-based and time-based vesting conditions."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 2,711 shares acquired under Quantum Corporation's Employee Stock Purchase Plan on February 5, 2021."}],"balance_after":1462918,"source":{"system":"sec-edgar","filing":"0000709283-21-000006","document":"wf-form4_161584260271901.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/709283/000070928321000006/wf-form4_161584260271901.xml","form_type":"4"}},{"id":2929743,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":80596,"kind":"person","name":"Lerner James J","position":1,"cik":"0001602567","reported_name":"Lerner James J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Pres. & CEO, Chairman of Board"}}],"security":"Common Stock","published_at":"2020-12-31T00:48:59.000Z","date":"2020-12-30","kind":"sale","acquired":false,"shares":35069,"price":5.6326,"value":197529.6494,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents the number of shares automatically sold, on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of performance stock units granted on September 6, 2019."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This is the price of the shares sold, $5.6326 per share. Upon request by the Commission staff, Quantum Corporation, or a security holder of Quantum Corporation, the Reporting Person will provide full information regarding the number of shares sold at this price as set forth in this Form 4."}],"balance_after":1300207,"source":{"system":"sec-edgar","filing":"0000709283-20-000046","document":"wf-form4_160937572590854.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/709283/000070928320000046/wf-form4_160937572590854.xml","form_type":"4"}},{"id":3035982,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":80596,"kind":"person","name":"Lerner James J","position":1,"cik":"0001602567","reported_name":"Lerner James J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Pres. & CEO, Chairman of Board"}}],"security":"Common Stock","published_at":"2020-09-09T20:06:17.000Z","date":"2020-09-08","kind":"sale","acquired":false,"shares":67834,"price":5.272,"value":357620.848,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents the number of shares automatically sold, on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of performance stock units granted on July 1, 2018."}],"balance_after":1335276,"source":{"system":"sec-edgar","filing":"0000709283-20-000033","document":"wf-form4_159968195621698.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/709283/000070928320000033/wf-form4_159968195621698.xml","form_type":"4"}},{"id":3042028,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":80596,"kind":"person","name":"Lerner James J","position":1,"cik":"0001602567","reported_name":"Lerner James J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Pres. & CEO, Chairman of Board"}}],"security":"Common Stock","published_at":"2020-09-02T17:54:12.000Z","date":"2020-08-31","kind":"sale","acquired":false,"shares":38808,"price":5.5784,"value":216486.5472,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents the number of shares automatically sold, on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of restricted stock units granted on July 1, 2018."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 1,918 shares acquired under Quantum Corporation's Employee Stock Purchase Plan on August 5, 2020."}],"balance_after":1403110,"source":{"system":"sec-edgar","filing":"0000709283-20-000027","document":"wf-form4_159906923839352.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/709283/000070928320000027/wf-form4_159906923839352.xml","form_type":"4"}},{"id":3094085,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":80596,"kind":"person","name":"Lerner James J","position":1,"cik":"0001602567","reported_name":"Lerner James J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Pres. & CEO, Chairman of Board"}}],"security":"Performance-Based Restricted Stock Units","published_at":"2020-07-02T20:28:53.000Z","date":"2020-07-01","kind":"grant","acquired":false,"shares":160000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Grant of Performance-Based Restricted Stock Units (\"PSUs\"), each of which represents a contingent right to receive one share of common stock of QMCO, with vesting subject to the achievement of specified levels of the average closing prices of a share of QMCO common stock during any one hundred (100) calendar day period occurring between July 1, 2020 and July 1, 2025. Vesting is subject to continued employment with QMCO through the later of the achievement date or service vesting date, which occurs in two equal installments on January 1, 2022 and July 1, 2023."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Grant of Performance-Based Restricted Stock Units (\"PSUs\"), each of which represents a contingent right to receive one share of common stock of QMCO, with vesting subject to the achievement of specified levels of the average closing prices of a share of QMCO common stock during any one hundred (100) calendar day period occurring between July 1, 2020 and July 1, 2025. Vesting is subject to continued employment with QMCO through the later of the achievement date or service vesting date, which occurs in two equal installments on January 1, 2022 and July 1, 2023."}],"balance_after":0,"derivative":{"expiration_date":"2025-07-01","underlying":"Common Stock","underlying_shares":160000},"source":{"system":"sec-edgar","filing":"0000709283-20-000016","document":"wf-form4_159372168304769.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/709283/000070928320000016/wf-form4_159372168304769.xml","form_type":"4"}},{"id":3094084,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":80596,"kind":"person","name":"Lerner James J","position":1,"cik":"0001602567","reported_name":"Lerner James J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Pres. & CEO, Chairman of Board"}}],"security":"Common Stock","published_at":"2020-07-02T20:28:53.000Z","date":"2020-07-01","kind":"grant","acquired":true,"shares":280000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"Grant of Restricted Stock Units (\"RSUs\"), each of which represents a contingent right to receive one share of common stock of QMCO.  Vesting is subject to continued employment with QMCO through the service vesting date, which occurs in three equal annual installments on July 1, 2021, July 1, 2022 and July 1, 2023."}],"balance_after":1440000,"source":{"system":"sec-edgar","filing":"0000709283-20-000016","document":"wf-form4_159372168304769.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/709283/000070928320000016/wf-form4_159372168304769.xml","form_type":"4"}},{"id":3201372,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":80596,"kind":"person","name":"Lerner James J","position":1,"cik":"0001602567","reported_name":"Lerner James J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Performance-Based Restricted Stock Units","published_at":"2020-03-19T20:37:55.000Z","date":"2020-03-17","kind":"exercise","acquired":false,"shares":80000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Performance-Based Restricted Stock Units were previously reported on September 10, 2019, which vest in three equal components upon the later of achievement of specified levels of the average closing prices of a share of QMCO common stock during any hundred (100) calendar day period, and upon specified service dates, whichever is later. The first achievement date occurred on March 17, 2020, as certified by the leadership and compensation committee of QMCO, resulting in 80,000 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest on September 5, 2020, subject to continued employment. These shares are reflected on Table I, and 160,000 units remaining subject to these performance-based and time-based vesting conditions."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Performance-Based Restricted Stock Units were previously reported on September 10, 2019, which vest in three equal components upon the later of achievement of specified levels of the average closing prices of a share of QMCO common stock during any hundred (100) calendar day period, and upon specified service dates, whichever is later. The first achievement date occurred on March 17, 2020, as certified by the leadership and compensation committee of QMCO, resulting in 80,000 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest on September 5, 2020, subject to continued employment. These shares are reflected on Table I, and 160,000 units remaining subject to these performance-based and time-based vesting conditions."}],"balance_after":160000,"derivative":{"expiration_date":"2029-09-06","underlying":"Common Stock","underlying_shares":80000},"source":{"system":"sec-edgar","filing":"0001628280-20-003830","document":"wf-form4_158465025570001.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/709283/000162828020003830/wf-form4_158465025570001.xml","form_type":"4"}},{"id":3201371,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":80596,"kind":"person","name":"Lerner James J","position":1,"cik":"0001602567","reported_name":"Lerner James J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Performance-Based Restricted Stock Units","published_at":"2020-03-19T20:37:55.000Z","date":"2020-03-17","kind":"exercise","acquired":false,"shares":150000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Performance-Based Restricted Stock Units were previously reported on August 27, 2019, which vest in three equal components upon the later of achievement of specified levels of the average closing prices of a share of QMCO common stock during any sixty (60) day trading period between July 1, 2018 and June 30, 2022, and upon specified service dates, whichever is later. 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Vesting is subject to continued employment with the Company through the later of the achievement date or service vesting date, which occurs in three equal annual installments on August 23, 2019, July 1, 2020 and July 1, 2021."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Grant of Performance-Based Restricted Stock Units, each of which represents a contingent right to receive one share of common stock of QMCO, with vesting subject to the achievement of specified levels of the average closing prices of a share of QMCO common stock during any sixty (60) day trading period on a National Exchange occurring between July 1, 2018 and June 30, 2022.  Vesting is subject to continued employment with the Company through the later of the achievement date or service vesting date, which occurs in three equal annual installments on August 23, 2019, July 1, 2020 and July 1, 2021."}],"balance_after":450000,"derivative":{"expiration_date":"2029-08-23","underlying":"Common Stock","underlying_shares":450000},"source":{"system":"sec-edgar","filing":"0000899243-19-022522","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/709283/000089924319022522/doc4.xml","form_type":"4"}},{"id":3428758,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":80596,"kind":"person","name":"Lerner James J","position":1,"cik":"0001602567","reported_name":"Lerner James J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, CEO"}}],"security":"Common Stock","published_at":"2019-08-27T20:13:40.000Z","date":"2019-08-23","kind":"grant","acquired":true,"shares":400000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F2","text":"Grant of Restricted Stock Units (\"RSUs\"), each of which represents a contingent right to receive one share of common stock of QMCO.  The RSUs were approved in connection with the reporting person's commencement of employment in 2018, although the grant was effective on August 23, 2019, the first business day on which QMCO became current with respect to its filings under the Exchange Act of 1934.  The RSUs vest in three equal annual installments beginning on beginning on July 1, 2019; although the first vesting date was deferred until August 23, 2019.  The remaining shares will vest in equal installments on July 1, 2020 and July 1, 2021."}],"balance_after":630000,"source":{"system":"sec-edgar","filing":"0000899243-19-022522","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/709283/000089924319022522/doc4.xml","form_type":"4"}},{"id":3428757,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":80596,"kind":"person","name":"Lerner James J","position":1,"cik":"0001602567","reported_name":"Lerner James J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, CEO"}}],"security":"Common Stock","published_at":"2019-08-27T20:13:40.000Z","date":"2019-08-23","kind":"grant","acquired":true,"shares":150000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"Grant of Restricted Stock Units (\"RSUs\"), each of which represents a contingent right to receive one share of common stock of QMCO.  The RSUs were approved in connection with the reporting person's commencement of employment in 2018, although the grant was effective on August 23, 2019, the first business day on which QMCO became current with respect to its filings under the Exchange Act of 1934.  150,000 RSUs were fully vested when the grant became effective on August 23, 2019."}],"balance_after":230000,"source":{"system":"sec-edgar","filing":"0000899243-19-022522","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/709283/000089924319022522/doc4.xml","form_type":"4"}},{"id":3440467,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":80596,"kind":"person","name":"Lerner James J","position":1,"cik":"0001602567","reported_name":"Lerner James J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, CEO"}}],"security":"Common Stock","published_at":"2019-08-13T10:05:01.000Z","date":"2019-08-09","kind":"purchase","acquired":true,"shares":65000,"price":5.1,"value":331500.0,"ownership":{"direct":true},"balance_after":80000,"source":{"system":"sec-edgar","filing":"0000899243-19-021613","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/709283/000089924319021613/doc4.xml","form_type":"4"}},{"id":3440466,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":80596,"kind":"person","name":"Lerner James J","position":1,"cik":"0001602567","reported_name":"Lerner James J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, CEO"}}],"security":"Common Stock","published_at":"2019-08-13T10:05:01.000Z","date":"2019-08-09","kind":"purchase","acquired":true,"shares":5000,"price":5.15,"value":25750.0,"ownership":{"direct":true},"balance_after":15000,"source":{"system":"sec-edgar","filing":"0000899243-19-021613","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/709283/000089924319021613/doc4.xml","form_type":"4"}},{"id":3440465,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":80596,"kind":"person","name":"Lerner James J","position":1,"cik":"0001602567","reported_name":"Lerner James J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, CEO"}}],"security":"Common Stock","published_at":"2019-08-13T10:05:01.000Z","date":"2019-08-09","kind":"purchase","acquired":true,"shares":5000,"price":5.115,"value":25575.0,"ownership":{"direct":true},"balance_after":10000,"source":{"system":"sec-edgar","filing":"0000899243-19-021613","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/709283/000089924319021613/doc4.xml","form_type":"4"}},{"id":3440464,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":80596,"kind":"person","name":"Lerner James J","position":1,"cik":"0001602567","reported_name":"Lerner James J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, CEO"}}],"security":"Common Stock","published_at":"2019-08-13T10:05:01.000Z","date":"2019-08-09","kind":"purchase","acquired":true,"shares":5000,"price":5.105,"value":25525.0,"ownership":{"direct":true},"balance_after":5000,"source":{"system":"sec-edgar","filing":"0000899243-19-021613","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/709283/000089924319021613/doc4.xml","form_type":"4"}}]}