| Cover | Aug. 10, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Aug. 10, 2020 |
| Entity Registrant Name | Ontrak, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-31932 |
| Entity Tax Identification Number | 88-0464853 |
| Entity Address, Address Line One | 2120 Colorado Ave. |
| Entity Address, Address Line Two | Suite 230 |
| Entity Address, City or Town | Santa Monica |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 90404 |
| City Area Code | 310 |
| Local Phone Number | 444-4300 |
| Title of 12(b) Security | Common Stock, $0.0001 par value |
| Trading Symbol | OTRK |
| Security Exchange Name | NASDAQ |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001136174 |
| Amendment Flag | false |
