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Restricted Cash and Cash Equivalents - Additional Information (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Cash and Cash Equivalents [Abstract]
Restricted cash and cash equivalents pertaining to oil and gas revenue payments	$ 3,250	$ 3,510

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- Definition

Restricted cash and cash equivalents pertaining to oil and gas revenue payments.

+ References

No definition available.

+ Details

Name:	pnrg_RestrictedCashAndCashEquivalentsPertainingToOilAndGasRevenuePayments
Namespace Prefix:	pnrg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- References

No definition available.

+ Details

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