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Supplementary Information - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2013
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Interest rate of Company's reserves	10.00%
Rate of discounted future net cash flows	10.00%
Percentage of discounted future prices	10.00%

X

- Definition

Discounted future net cash flows discounting rate used to derive standard measure of discounted future net cash flows.

+ References

No definition available.

+ Details

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X

- Definition

Percentage of discounted future prices.

+ References

No definition available.

+ Details

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Namespace Prefix:	pnrg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of minority interest share in aggregate company's reserves.

+ References

No definition available.

+ Details

Name:	pnrg_PercentageOfMinorityInterestShareInAggregateCompanysReserves
Namespace Prefix:	pnrg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

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