Note 9 - Capitalized Costs (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Cost of Non-Producing Oil and Natural Gas Properties	$ 0	$ 1,378,864

Cost of non-producing oil and natural gas properties.

No definition available.

Name:	phx_CostOfNonProducingOilAndNaturalGasProperties
Namespace Prefix:	phx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant