Capitalized Costs (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Capitalized Costs [Abstract]
Cost of Non-Producing Oil and Natural Gas Properties	$ 83,174	$ 0

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