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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - shares	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Statement of Stockholders' Equity [Abstract]
Exercise of stock option, shares withheld	8,258	3,592

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- Definition

Exercise of stock option, shares withheld

+ References

No definition available.

+ Details

Name:	PEYE_ExerciseOfStockOptionSharesWithheld
Namespace Prefix:	PEYE_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

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