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Value of Financial Instruments (Details Narrative) $ in Thousands	Jun. 30, 2017 USD ($)
Investments, All Other Investments [Abstract]
Commitments to extend credit	$ 3,300

X

- Definition

The contractual amount of off-balance sheet lending-related financial instruments (e.g., commitments), which represents the maximum possible credit risk should the counterparty draw upon the commitment.

+ References

No definition available.

+ Details

Name:	OPHC_OffBalanceSheetLendingRelatedFinancialCommitmentsContractualAmount
Namespace Prefix:	OPHC_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- References

No definition available.

+ Details

Name:	us-gaap_InvestmentsAllOtherInvestmentsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration