Restricted Cash and Cash Equivalents - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Cash And Cash Equivalents [Abstract]
Restricted cash and cash equivalents pertaining to oil and gas revenue payments	$ 3.51	$ 2.01

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

No definition available.

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