Oil and Natural Gas Properties and Other Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2015	Jun. 30, 2014
Oil and natural gas properties:
Proved	$ 49,621	$ 82,362
Unproved	10,398	19,109
Total oil and natural gas properties	60,019	101,471
Less accumulated depletion and impairment	(29,854)	(19,138)
Net oil and natural gas properties capitalized costs	$ 30,165	$ 82,333