| Cover | Nov. 08, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Nov. 8, 2021 |
| Entity Registrant Name | FEDNAT HOLDING COMPANY |
| Entity Incorporation, State or Country Code | FL |
| Entity File Number | 000-25001 |
| Entity Tax Identification Number | 65-0248866 |
| Entity Address, Address Line One | 14050 N.W. 14th Street |
| Entity Address, Address Line Two | Suite 180 |
| Entity Address, City or Town | Sunrise |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 33323 |
| City Area Code | 800 |
| Local Phone Number | 293-2532 |
| 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 | FNHC |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001069996 |
| Amendment Flag | false |
