{"cik":1267565,"taxonomy":"us-gaap","tag":"LongTermDebt","label":"Long-term Debt","description":"Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.","entityName":"Collegium Pharmaceutical, Inc.","units":{"USD":[{"end":"2016-12-31","val":4146000,"accn":"0001558370-17-001629","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-10","frame":"CY2016Q4I"},{"end":"2018-03-31","val":11500000,"accn":"0001558370-18-004474","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-09","frame":"CY2018Q1I"},{"end":"2018-06-30","val":11500000,"accn":"0001558370-18-006748","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2I"},{"end":"2018-09-30","val":11500000,"accn":"0001558370-18-009001","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-08","frame":"CY2018Q3I"},{"end":"2018-12-31","val":11500000,"accn":"0001558370-19-001187","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-27","frame":"CY2018Q4I"},{"end":"2019-03-31","val":11500000,"accn":"0001558370-19-004446","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-08","frame":"CY2019Q1I"},{"end":"2019-06-30","val":11500000,"accn":"0001558370-19-007458","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-07","frame":"CY2019Q2I"},{"end":"2019-09-30","val":11500000,"accn":"0001558370-19-010153","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-06","frame":"CY2019Q3I"},{"end":"2019-12-31","val":11500000,"accn":"0001558370-20-001625","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-27","frame":"CY2019Q4I"}]}}