| Cover Page | Sep. 26, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K/A |
| Document Period End Date | Sep. 26, 2023 |
| Entity Registrant Name | Curis, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 000-30347 |
| Entity Tax Identification Number | 04-3505116 |
| Entity Address, Address Line One | 128 Spring Street |
| Entity Address, Address Line Two | Building C - Suite 500 |
| Entity Address, City or Town | Lexington |
| Entity Address, State or Province | MA |
| Entity Address, Postal Zip Code | 02421 |
| City Area Code | (617) |
| Local Phone Number | 503-6500 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, Par Value $0.01 per share |
| Trading Symbol | CRIS |
| Entity Emerging Growth Company | false |
| Security Exchange Name | NASDAQ |
| Entity Central Index Key | 0001108205 |
| Amendment Flag | false |
| Current Fiscal Year End Date | --12-31 |
