Capitalized Costs (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Capitalized Costs [Abstract]
Cost of Non-Producing Oil and Natural Gas Properties	$ 908,872	$ 83,174

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