Document and Entity Information - $ / shares	6 Months Ended
	Jun. 30, 2016	Aug. 15, 2016
Document And Entity Information
Entity Registrant Name	OptimumBank Holdings, Inc.
Entity Central Index Key	0001288855
Document Type	10-Q
Document Period End Date	Jun. 30, 2016
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Is Entity a Well-known Seasoned Issuer?	No
Is Entity a Voluntary Filer?	No
Is Entity's Reporting Status Current?	Yes
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		1,143,916
Entity Common Stock, Par Value Per Share	$ 0.01
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2016