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Stock-Based Compensation (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Share-based compensation expense, shares	36,101
Share-based compensation expense	$ 614
Directors [Member]
Share-based compensation expense, shares	36,101
Share-based compensation expense	$ 200
Number of stock issuable during prior periods	105,820
2011 Equity Incentive Plan [Member] | Directors [Member]
Share-based compensation expense, shares		2,821
Shares issued, price per share		$ 3.14

X

- Definition

Number of stock issuable during prior periods.

+ References

No definition available.

+ Details

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Namespace Prefix:	OPHC_
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Balance Type:	na
Period Type:	duration

X

- Definition

Per share or per unit amount of equity securities issued.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Value, before forfeitures, of stock or other type of equity granted of any equity-based compensation plan other than an employee stock ownership plan (ESOP).

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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X

- Definition

Gross number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

+ References

No definition available.

+ Details

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X

- Details

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Namespace Prefix:
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X

- Details

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Balance Type:
Period Type: