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Segment Information and Major Customers (Details Textual) (Minimum [Member])	12 Months Ended
	Dec. 31, 2012
Minimum [Member]
Segment Information and Major Customers (Textual) [Abstract]
Customer purchases with respect of company's sales	10.00%

X

- Details

Name:	pnrg_SegmentInformationAndMajorCustomersTextualAbstract
Namespace Prefix:	pnrg_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues.

+ References

No definition available.

+ Details

Name:	us-gaap_EntityWideRevenueMajorCustomerPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration