| Document And Entity Information | Apr. 17, 2023 |
| Document Information [Line Items] | |
| Entity, Registrant Name | KINGSWAY FINANCIAL SERVICES INC. |
| Document, Type | 8-K |
| Document, Period End Date | Apr. 17, 2023 |
| Entity, Incorporation, State or Country Code | DE |
| Entity, File Number | 001-15204 |
| Entity, Tax Identification Number | 85-1792291 |
| Entity, Address, Address Line One | 10 S. Riverside Plaza, Suite 1520 |
| Entity, Address, City or Town | Chicago |
| Entity, Address, State or Province | IL |
| Entity, Address, Postal Zip Code | 60606 |
| City Area Code | 312 |
| Local Phone Number | 766-2138 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | KFS |
| Security Exchange Name | NYSE |
| Entity, Emerging Growth Company | false |
| Amendment Flag | false |
| Entity, Central Index Key | 0001072627 |
