| Cover | Oct. 06, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Oct. 06, 2023 |
| Entity File Number | 000-50755 |
| Entity Registrant Name | OPTIMUMBANK HOLDINGS, INC. |
| Entity Central Index Key | 0001288855 |
| Entity Tax Identification Number | 55-0865043 |
| Entity Incorporation, State or Country Code | FL |
| Entity Address, Address Line One | 2929 East Commercial Boulevard |
| Entity Address, City or Town | Ft. Lauderdale |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 33308 |
| City Area Code | (954) |
| Local Phone Number | 776-2332 |
| 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 | OPHC |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Information, Former Legal or Registered Name | Not Applicable |
