Fair Value Measurements (Details) - USD ($) $ in Thousands	Mar. 31, 2015	Jun. 30, 2014	Jun. 30, 2013
Assets
Commodities derivatives	$ 292	$ 37
2009A and 2009B Debentures of O&G Leasing, LLC (nonrecurring)	927	4,820
Liabilities
Asset retirement obligations (non-recurring)	$ (5,834)	(5,745)	$ (5,020)
Commodities derivative liability		(121)
Environmental remediation liability
Fair Value [Member]
Assets
Commodities derivatives	$ 292	37
Oil and gas properties impairment (nonrecurring)		(487)
Total	292	(450)
Liabilities
Asset retirement obligations (non-recurring)	(5,834)	(5,745)
Commodities derivative liability	(186)	(121)
Environmental remediation liability	(2,057)	(2,067)
Total	(8,077)	(7,933)
Fair Value, Inputs, Level 2 [Member]
Assets
Commodities derivatives	292	37
Total	292	37
Liabilities
Commodities derivative liability	(186)	(121)
Total	(186)	(121)
Fair Value, Inputs, Level 3 [Member]
Assets
Oil and gas properties impairment (nonrecurring)		(487)
Total		(487)
Liabilities
Asset retirement obligations (non-recurring)	(5,834)	(5,745)
Environmental remediation liability	(2,057)	(2,067)
Total	$ (7,891)	$ (7,812)