XML 40 R1.htm IDEA: XBRL DOCUMENT v3.24.0.1
Cover - USD ($)
 12 Months Ended
Dec. 31, 2023
Mar. 08, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2023    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2023    
Current Fiscal Year End Date --12-31    
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 Blvd. Suite 303    
Entity Address, City or Town Fort Lauderdale    
Entity Address, State or Province FL    
Entity Address, Postal Zip Code 33308    
City Area Code (954)    
Local Phone Number 900-2800    
Title of 12(b) Security Common Stock, par value $0.01 per share    
Trading Symbol OPHC    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 16,404,918
Entity Common Stock, Shares Outstanding   7,867,386  
Documents Incorporated By Reference Portions of the Proxy Statement for the 2024 Annual Meeting of Shareholders to be filed with the Securities and Exchange Commission pursuant to Regulation 14A within 120 days of the issuer’s fiscal year end are incorporated by reference into Part III, Items 10 through 14, of this Annual Report on Form 10-K.    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Auditor Firm ID 400    
Auditor Name HACKER, JOHNSON & SMITH PA    
Auditor Location Fort Lauderdale, Florida