{"cik":1383701,"taxonomy":"us-gaap","tag":"AllocatedShareBasedCompensationExpense","label":"Share-based Payment Arrangement, Expense","description":"Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.","entityName":"Histogen Inc.","units":{"USD":[{"start":"2016-01-01","end":"2016-12-31","val":3400000,"accn":"0001564590-19-007030","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-12-31","val":4100000,"accn":"0001564590-19-007030","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":4100000,"accn":"0001564590-20-010122","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-11","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":1000000,"accn":"0001564590-19-015689","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-03","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":1900000,"accn":"0001564590-19-030048","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-07"},{"start":"2018-04-01","end":"2018-06-30","val":900000,"accn":"0001564590-19-030048","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-07","frame":"CY2018Q2"},{"start":"2018-01-01","end":"2018-09-30","val":2900000,"accn":"0001564590-19-040404","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-05"},{"start":"2018-07-01","end":"2018-09-30","val":900000,"accn":"0001564590-19-040404","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-05","frame":"CY2018Q3"},{"start":"2018-01-01","end":"2018-12-31","val":3800000,"accn":"0001564590-19-007030","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":3800000,"accn":"0001564590-20-010122","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-11","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":900000,"accn":"0001564590-19-015689","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-03"},{"start":"2019-01-01","end":"2019-03-31","val":900000,"accn":"0001564590-20-020517","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-01","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":2100000,"accn":"0001564590-19-030048","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-07"},{"start":"2019-01-01","end":"2019-06-30","val":214000,"accn":"0001564590-20-040035","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-13"},{"start":"2019-04-01","end":"2019-06-30","val":1200000,"accn":"0001564590-19-030048","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-07"},{"start":"2019-04-01","end":"2019-06-30","val":116000,"accn":"0001564590-20-040035","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-13","frame":"CY2019Q2"},{"start":"2019-01-01","end":"2019-09-30","val":3200000,"accn":"0001564590-19-040404","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-05"},{"start":"2019-01-01","end":"2019-09-30","val":329000,"accn":"0001564590-20-053000","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-10"},{"start":"2019-07-01","end":"2019-09-30","val":1200000,"accn":"0001564590-19-040404","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-05"},{"start":"2019-07-01","end":"2019-09-30","val":115000,"accn":"0001564590-20-053000","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-10","frame":"CY2019Q3"},{"start":"2019-01-01","end":"2019-12-31","val":4200000,"accn":"0001564590-20-010122","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-11"},{"start":"2019-01-01","end":"2019-12-31","val":438000,"accn":"0001564590-21-012536","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-11","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":900000,"accn":"0001564590-20-020517","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-01"},{"start":"2020-01-01","end":"2020-03-31","val":101000,"accn":"0001564590-21-027602","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-13","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":331000,"accn":"0001564590-20-040035","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-13"},{"start":"2020-01-01","end":"2020-06-30","val":331000,"accn":"0001564590-21-043452","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-11"},{"start":"2020-04-01","end":"2020-06-30","val":230000,"accn":"0001564590-20-040035","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-13"},{"start":"2020-04-01","end":"2020-06-30","val":230000,"accn":"0001564590-21-043452","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-11","frame":"CY2020Q2"},{"start":"2020-01-01","end":"2020-09-30","val":456000,"accn":"0001564590-20-053000","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-10"},{"start":"2020-01-01","end":"2020-09-30","val":456000,"accn":"0001564590-21-056218","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-10"},{"start":"2020-07-01","end":"2020-09-30","val":125000,"accn":"0001564590-20-053000","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-10"},{"start":"2020-07-01","end":"2020-09-30","val":125000,"accn":"0001564590-21-056218","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-10","frame":"CY2020Q3"},{"start":"2020-01-01","end":"2020-12-31","val":618000,"accn":"0001564590-21-012536","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-11"},{"start":"2020-01-01","end":"2020-12-31","val":618000,"accn":"0001564590-22-009664","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-10","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":209000,"accn":"0001564590-21-027602","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-13"},{"start":"2021-01-01","end":"2021-03-31","val":209000,"accn":"0001564590-22-019887","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-12","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":499000,"accn":"0001564590-21-043452","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-11"},{"start":"2021-01-01","end":"2021-06-30","val":499000,"accn":"0001564590-22-029135","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-11"},{"start":"2021-04-01","end":"2021-06-30","val":289000,"accn":"0001564590-21-043452","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-11"},{"start":"2021-04-01","end":"2021-06-30","val":289000,"accn":"0001564590-22-029135","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-11","frame":"CY2021Q2"},{"start":"2021-01-01","end":"2021-09-30","val":667000,"accn":"0001564590-21-056218","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-10"},{"start":"2021-01-01","end":"2021-09-30","val":667000,"accn":"0000950170-22-024542","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-10"},{"start":"2021-07-01","end":"2021-09-30","val":169000,"accn":"0001564590-21-056218","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-10"},{"start":"2021-07-01","end":"2021-09-30","val":169000,"accn":"0000950170-22-024542","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-10","frame":"CY2021Q3"},{"start":"2021-01-01","end":"2021-12-31","val":704000,"accn":"0001564590-22-009664","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-10"},{"start":"2021-01-01","end":"2021-12-31","val":704000,"accn":"0000950170-23-007056","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-09","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":165000,"accn":"0001564590-22-019887","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-12"},{"start":"2022-01-01","end":"2022-03-31","val":165000,"accn":"0000950170-23-021301","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-11","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":280000,"accn":"0001564590-22-029135","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-11"},{"start":"2022-01-01","end":"2022-06-30","val":280000,"accn":"0000950170-23-041379","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-10"},{"start":"2022-04-01","end":"2022-06-30","val":114000,"accn":"0001564590-22-029135","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-11"},{"start":"2022-04-01","end":"2022-06-30","val":114000,"accn":"0000950170-23-041379","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-10","frame":"CY2022Q2"},{"start":"2022-01-01","end":"2022-09-30","val":413000,"accn":"0000950170-22-024542","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-10"},{"start":"2022-01-01","end":"2022-09-30","val":413000,"accn":"0000950170-23-062115","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-09"},{"start":"2022-07-01","end":"2022-09-30","val":133000,"accn":"0000950170-22-024542","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-10"},{"start":"2022-07-01","end":"2022-09-30","val":133000,"accn":"0000950170-23-062115","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-09","frame":"CY2022Q3"},{"start":"2022-01-01","end":"2022-12-31","val":502000,"accn":"0000950170-23-007056","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-09","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":419000,"accn":"0000950170-23-021301","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-11","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":451000,"accn":"0000950170-23-041379","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-10"},{"start":"2023-04-01","end":"2023-06-30","val":32000,"accn":"0000950170-23-041379","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-10","frame":"CY2023Q2"},{"start":"2023-01-01","end":"2023-09-30","val":444000,"accn":"0000950170-23-062115","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-09"},{"start":"2023-07-01","end":"2023-09-30","val":-7000,"accn":"0000950170-23-062115","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-09","frame":"CY2023Q3"}]}}