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Regulatory Matters (Details Narrative)	Sep. 30, 2019
Banking and Thrift [Abstract]
Minimum requirement of capital conservation buffer, ratio	2.50%

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- Definition

The minimum capital conservation buffer above minimum risk-based capital requirements that must be maintained by the bank, as per capital conservation buffer rules implemented by banking regulations.

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No definition available.

+ Details

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Namespace Prefix:	OPHC_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

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- References

No definition available.

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Name:	us-gaap_BankingAndThriftAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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