Oil and Gas Activities (Tables)

12 Months Ended

Jun. 30, 2013

Oil and Gas Exploration and Production Industries Disclosures [Abstract]

Cost Incurred in Oil and Gas Property Acquisition, Exploration, and Development Activities Disclosure

Costs incurred in oil and gas property acquisition, exploration, and development activities, whether capitalized or expensed, are summarized as follows:

	United States		Australia		United Kingdom		Total
	(In thousands)
Fiscal year ended June 30, 2013
Proved	$	3,399	$	—	$	—	$	3,399
Unproved	157		179		335		671
Exploration Costs	398		4,169		3,700		8,267
Development Costs	2,045		—		—		2,045
Total, including asset retirement obligation	$	5,999	$	4,348	$	4,035	$	14,382
Fiscal year ended June 30, 2012
Proved	$	1,606	$	5,634	$	—	$	7,240
Unproved	945		3,787		—		4,732
Exploration Costs	2,192		1		5		2,198
Development Costs	2,779		—		—		2,779
Total, including asset retirement obligation	$	7,522	$	9,422	$	5	$	16,949

Schedule of Capitalized Costs of Unproved Properties Excluded from Amortization

The net changes in capitalized costs that are currently not being depleted pending the determination of proved reserves can be summarized as follows:

	United States			Australia			United Kingdom			Total
	(In thousands)
Fiscal year ended June 30, 2013
Fiscal year beginning balance	$	1,823		$	4,388		$	4,624		$	10,835
Additions to capitalized costs	1,954			—			335			2,289
Reclassified to producing properties	(3,223		)	—			—			(3,223		)
Charged to expense	(57		)	—			(3,035		)	(3,092		)
Exchange adjustment	—			(412		)	(162		)	(574		)
Fiscal year closing balance	$	497		$	3,976		$	1,762		$	6,235
Fiscal year ended June 30, 2012
Fiscal year beginning balance	$	2,411		$	415		$	5,259		$	8,085
Additions to capitalized costs	4,631			3,973			1,369			9,973
Assets sold or held for sale	(150		)	—			—			(150		)
Reclassified to producing properties	(3,772		)	—			—			(3,772		)
Charged to expense	(1,297		)	—			(2,106		)	(3,403		)
Exchange adjustment	—			—			102			102
Fiscal year closing balance	$	1,823		$	4,388		$	4,624		$	10,835