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In addition, the restricted stock units will vest upon a Change of Control, an employee's termination without Cause, or resignation for Good Reason, as such terms are defined in the Issuer's 2013 Incentive Award Plan.  Upon any other termination of service of the Reporting Person, unvested restricted stock units will be forfeited."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F16","text":"The restricted stock units will vest, subject to the Reporting Person's continuous service to the Issuer through the vesting date, on the first anniversary of the grant date.  In addition, the restricted stock units will vest upon a Change of Control, an employee's termination without Cause, or resignation for Good Reason, as such terms are defined in the Issuer's 2013 Incentive Award Plan.  Upon any other termination of service of the Reporting Person, unvested restricted stock units will be forfeited."}],"balance_after":650000,"derivative":{"underlying":"Common Stock","underlying_shares":650000},"source":{"system":"sec-edgar","filing":"0001209191-19-044008","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1324466/000120919119044008/doc4.xml","form_type":"4"}},{"id":3450618,"issuer":{"id":112047,"kind":"organization","name":"Histogen Inc.","symbol":"HSTO"},"owners":[{"id":70032,"kind":"person","name":"Mento Steven J","position":1,"cik":"0001324466","reported_name":"Mento Steven J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, CEO & Director"}}],"security":"Stock Option (Right to Buy)","published_at":"2019-08-01T16:11:38.000Z","date":"2019-08-01","kind":"disposition_to_issuer","acquired":false,"shares":350000,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F13","text":"On August 1, 2019, the Issuer canceled the option granted on February 7, 2019. In exchange for the canceled option, the Reporting Person received 175,000 restricted stock units. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F12","text":"The option was granted on February 7, 2019. 25% of the total number of shares of common stock subject to the option will vest on February 7, 2020, and 1/48th of the total number of shares of common stock subject to the option will vest monthly thereafter, subject to the Reporting Person's continued employment or service relationship with the Issuer on each such vesting date."}],"balance_after":0,"derivative":{"exercise_price":2,"expiration_date":"2029-02-06","underlying":"Common Stock","underlying_shares":350000},"source":{"system":"sec-edgar","filing":"0001209191-19-044008","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1324466/000120919119044008/doc4.xml","form_type":"4"}},{"id":3450617,"issuer":{"id":112047,"kind":"organization","name":"Histogen Inc.","symbol":"HSTO"},"owners":[{"id":70032,"kind":"person","name":"Mento Steven J","position":1,"cik":"0001324466","reported_name":"Mento Steven J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, CEO & Director"}}],"security":"Stock Option (Right to Buy)","published_at":"2019-08-01T16:11:38.000Z","date":"2019-08-01","kind":"disposition_to_issuer","acquired":false,"shares":120000,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F11","text":"On August 1, 2019, the Issuer canceled the option granted on February 4, 2018. In exchange for the canceled option, the Reporting Person received 60,000 restricted stock units. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F10","text":"The option was granted on February 4, 2018. 25% of the total number of shares of common stock subject to the option vested on February 2, 2019, and 1/48th of the total number of shares of common stock subject to the option vest monthly thereafter, subject to the Reporting Person's continued employment or service relationship with the Issuer on each such vesting date."}],"balance_after":0,"derivative":{"exercise_price":5.17,"expiration_date":"2028-02-03","underlying":"Common Stock","underlying_shares":120000},"source":{"system":"sec-edgar","filing":"0001209191-19-044008","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1324466/000120919119044008/doc4.xml","form_type":"4"}},{"id":3450616,"issuer":{"id":112047,"kind":"organization","name":"Histogen Inc.","symbol":"HSTO"},"owners":[{"id":70032,"kind":"person","name":"Mento Steven J","position":1,"cik":"0001324466","reported_name":"Mento Steven J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, CEO & Director"}}],"security":"Stock Option (Right to Buy)","published_at":"2019-08-01T16:11:38.000Z","date":"2019-08-01","kind":"disposition_to_issuer","acquired":false,"shares":172500,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F9","text":"On August 1, 2019, the Issuer canceled the option granted on January 26, 2017. In exchange for the canceled option, the Reporting Person received 86,250 restricted stock units. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F8","text":"The option was granted on January 26, 2017. 25% of the total number of shares of common stock subject to the option vested on January 26, 2018, and 1/48th of the total number of shares of common stock subject to the option vest monthly thereafter, subject to the Reporting Person's continued employment or service relationship with the Issuer on each such vesting date."}],"balance_after":0,"derivative":{"exercise_price":4.21,"expiration_date":"2027-01-25","underlying":"Common Stock","underlying_shares":172500},"source":{"system":"sec-edgar","filing":"0001209191-19-044008","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1324466/000120919119044008/doc4.xml","form_type":"4"}},{"id":3450615,"issuer":{"id":112047,"kind":"organization","name":"Histogen Inc.","symbol":"HSTO"},"owners":[{"id":70032,"kind":"person","name":"Mento Steven J","position":1,"cik":"0001324466","reported_name":"Mento Steven J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, CEO & Director"}}],"security":"Stock Option (Right to Buy)","published_at":"2019-08-01T16:11:38.000Z","date":"2019-08-01","kind":"disposition_to_issuer","acquired":false,"shares":37500,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F7","text":"On August 1, 2019, the Issuer canceled the option granted on February 4, 2016. In exchange for the canceled option, the Reporting Person received 18,750 restricted stock units. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Immediately exercisable."}],"balance_after":0,"derivative":{"exercise_price":1.85,"expiration_date":"2026-02-03","underlying":"Common Stock","underlying_shares":37500},"source":{"system":"sec-edgar","filing":"0001209191-19-044008","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1324466/000120919119044008/doc4.xml","form_type":"4"}},{"id":3450614,"issuer":{"id":112047,"kind":"organization","name":"Histogen Inc.","symbol":"HSTO"},"owners":[{"id":70032,"kind":"person","name":"Mento Steven J","position":1,"cik":"0001324466","reported_name":"Mento Steven J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, CEO & Director"}}],"security":"Stock Option (Right to Buy)","published_at":"2019-08-01T16:11:38.000Z","date":"2019-08-01","kind":"disposition_to_issuer","acquired":false,"shares":20000,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F6","text":"On August 1, 2019, the Issuer canceled the option granted on February 4, 2016. In exchange for the canceled option, the Reporting Person received 10,000 restricted stock units. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The option was granted on February 4, 2016. 25% of the total number of shares of common stock subject to the option vested on February 4, 2017, and 1/48th of the total number of shares of common stock subject to the option vest monthly thereafter, subject to the Reporting Person's continued employment or service relationship with the Issuer on each such vesting date."}],"balance_after":0,"derivative":{"exercise_price":1.85,"expiration_date":"2026-02-03","underlying":"Common Stock","underlying_shares":20000},"source":{"system":"sec-edgar","filing":"0001209191-19-044008","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1324466/000120919119044008/doc4.xml","form_type":"4"}},{"id":3450613,"issuer":{"id":112047,"kind":"organization","name":"Histogen Inc.","symbol":"HSTO"},"owners":[{"id":70032,"kind":"person","name":"Mento Steven J","position":1,"cik":"0001324466","reported_name":"Mento Steven J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, CEO & Director"}}],"security":"Stock Option (Right to Buy)","published_at":"2019-08-01T16:11:38.000Z","date":"2019-08-01","kind":"disposition_to_issuer","acquired":false,"shares":50000,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"On August 1, 2019, the Issuer canceled the option granted on February 23, 2015. In exchange for the canceled option, the Reporting Person received 25,000 restricted stock units. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Immediately exercisable."}],"balance_after":0,"derivative":{"exercise_price":6.4,"expiration_date":"2025-02-22","underlying":"Common Stock","underlying_shares":50000},"source":{"system":"sec-edgar","filing":"0001209191-19-044008","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1324466/000120919119044008/doc4.xml","form_type":"4"}},{"id":3450612,"issuer":{"id":112047,"kind":"organization","name":"Histogen Inc.","symbol":"HSTO"},"owners":[{"id":70032,"kind":"person","name":"Mento Steven J","position":1,"cik":"0001324466","reported_name":"Mento Steven J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, CEO & Director"}}],"security":"Stock Option (Right to Buy)","published_at":"2019-08-01T16:11:38.000Z","date":"2019-08-01","kind":"disposition_to_issuer","acquired":false,"shares":150000,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"On August 1, 2019, the Issuer canceled the option granted on February 23, 2015. In exchange for the canceled option, the Reporting Person received 75,000 restricted stock units. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Immediately exercisable."}],"balance_after":0,"derivative":{"exercise_price":6.4,"expiration_date":"2025-02-22","underlying":"Common Stock","underlying_shares":150000},"source":{"system":"sec-edgar","filing":"0001209191-19-044008","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1324466/000120919119044008/doc4.xml","form_type":"4"}},{"id":3450611,"issuer":{"id":112047,"kind":"organization","name":"Histogen Inc.","symbol":"HSTO"},"owners":[{"id":70032,"kind":"person","name":"Mento Steven J","position":1,"cik":"0001324466","reported_name":"Mento Steven J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, CEO & Director"}}],"security":"Stock Option (Right to Buy)","published_at":"2019-08-01T16:11:38.000Z","date":"2019-08-01","kind":"disposition_to_issuer","acquired":false,"shares":400000,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"On August 1, 2019, the Issuer canceled the option granted on February 7, 2014. In exchange for the canceled option, the Reporting Person received 200,000 restricted stock units. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Immediately exercisable."}],"balance_after":0,"derivative":{"exercise_price":9.45,"expiration_date":"2024-02-06","underlying":"Common Stock","underlying_shares":400000},"source":{"system":"sec-edgar","filing":"0001209191-19-044008","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1324466/000120919119044008/doc4.xml","form_type":"4"}},{"id":3665661,"issuer":{"id":112047,"kind":"organization","name":"Histogen Inc.","symbol":"HSTO"},"owners":[{"id":70032,"kind":"person","name":"Mento Steven J","position":1,"cik":"0001324466","reported_name":"Mento Steven J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, CEO & Director"}}],"security":"Stock Option (Right to Buy)","published_at":"2019-02-11T16:14:17.000Z","date":"2019-02-07","kind":"grant","acquired":true,"shares":350000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The option was granted on February 7, 2019. 25% of the total number of shares of common stock subject to the option will vest on February 6, 2020, and 1/48th of the total number of shares of common stock subject to the option will vest monthly thereafter, subject to the Reporting Person's continued employment or service relationship with the Issuer on each such vesting date."}],"balance_after":350000,"derivative":{"exercise_price":2,"expiration_date":"2029-02-06","underlying":"Common Stock","underlying_shares":350000},"source":{"system":"sec-edgar","filing":"0001209191-19-008917","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1324466/000120919119008917/doc4.xml","form_type":"4"}},{"id":3897413,"issuer":{"id":7038,"kind":"organization","name":"SANGAMO THERAPEUTICS, INC"},"owners":[{"id":70032,"kind":"person","name":"Mento Steven J","position":1,"cik":"0001324466","reported_name":"Mento Steven J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2018-06-13T00:26:37.000Z","date":"2018-06-11","kind":"grant","acquired":true,"shares":15000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Each option is immediately exercisable for all option shares, but shares purchased under the option are subject to certain repurchase rights by the Issuer upon cessation of the Reporting Person's service on the Board of the Directors of the Issuer.  The shares subject to the option vest in 12 successive equal monthly installments upon the Reporting Person's completion of each month of Board service over the 12-month period measured from the grant date."}],"balance_after":15000,"derivative":{"exercise_price":15.65,"expiration_date":"2028-06-10","underlying":"Common Stock","underlying_shares":15000},"source":{"system":"sec-edgar","filing":"0001209191-18-037347","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1001233/000120919118037347/doc4.xml","form_type":"4"}},{"id":3897412,"issuer":{"id":7038,"kind":"organization","name":"SANGAMO THERAPEUTICS, INC"},"owners":[{"id":70032,"kind":"person","name":"Mento Steven J","position":1,"cik":"0001324466","reported_name":"Mento Steven J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2018-06-13T00:26:37.000Z","date":"2018-06-11","kind":"grant","acquired":true,"shares":2500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares of common stock issuable upon settlement of restricted stock units (\"RSUs\").  The RSUs will fully vest on the earlier of (x) June 11, 2019 (the first anniversary of the date of grant) or (y) the day prior to the 2019 annual stockholders meeting, subject to the Reporting Person's continued service on the Issuer's Board of Directors through such date."}],"balance_after":14332,"source":{"system":"sec-edgar","filing":"0001209191-18-037347","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1001233/000120919118037347/doc4.xml","form_type":"4"}},{"id":3944042,"issuer":{"id":112047,"kind":"organization","name":"Histogen Inc.","symbol":"HSTO"},"owners":[{"id":70032,"kind":"person","name":"Mento Steven J","position":1,"cik":"0001324466","reported_name":"Mento Steven J","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President, CEO & Director"}}],"security":"Stock Option (Right to 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