| Document and Entity Information | Mar. 03, 2023 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001367920 |
| Current Fiscal Year End Date | --12-31 |
| Document Type | 8-K |
| Document Period End Date | Mar. 03, 2023 |
| Entity Registrant Name | Concert Pharmaceuticals, Inc. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-36310 |
| Entity Tax Identification Number | 20-4839882 |
| Entity Address, Address Line One | 65 Hayden Avenue |
| Entity Address, Address Line Two | Suite 3000N |
| Entity Address, City or Town | Lexington |
| Entity Address, State or Province | MA |
| Entity Address, Postal Zip Code | 02421 |
| City Area Code | (781) |
| Local Phone Number | 860-0045 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, $0.001 par value per share |
| Trading Symbol | CNCE |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
