INVESTMENT IN OIL AND GAS PROPERTIES (Details) (USD $)	3 Months Ended		6 Months Ended						1 Months Ended	6 Months Ended		1 Months Ended			6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Jun. 30, 2012	Dec. 31, 2012 Dana	Dec. 31, 2012 Tullow Guinea Ltd	Nov. 20, 2012 Tullow Guinea Ltd	Dec. 31, 2012 SCS	Dec. 31, 2012 Maximum	Dec. 31, 2012 Minimum	Dec. 31, 2012 Minimum SCS m	Jun. 30, 2010 3D Seismic Contract with PGS sqkm	Dec. 31, 2012 3D Seismic Contract with PGS	Dec. 31, 2012 3D Seismic Contract with Veritas sqkm	Dec. 31, 2012 Guinea concession	Dec. 30, 2012 Guinea concession
Investments in oil and gas properties
Ownership interest in Guinea Concession (as a percent)						23.00%	40.00%									37.00%	77.00%
Capitalized costs	$ 1,200,000	$ 2,000,000	$ 2,300,000	$ 3,500,000
Oil and Gas Properties:
Proved Oil and Gas Properties	116,753,000		116,753,000		116,312,000											116,800,000
Unproved Oil and Gas Properties	12,060,000		12,060,000		32,469,000
Other Equipment Costs	6,809,000		6,809,000		6,809,000
Total Oil and Gas Properties	135,622,000		135,622,000		155,590,000
Less- accumulated depreciation, depletion and amortization	(116,753,000)		(116,753,000)		(116,312,000)											(116,800,000)
Unevaluated properties excluded from amortization	18,869,000		18,869,000		39,278,000
Geological and geophysical cost														3,300,000
Expected evaluation activities period for unproved properties										3 years	1 year
Additional well related costs recognized			400,000
Area of 3D seismic survey acquired													3,635		4,000
Ownership interest sold (as a percent)									40.00%
Consideration of sale of interest in PSC									27,000,000
Depth of exploration well to be drilled												2,000
Gross expenditure for an exploration well to be paid by Tullow as additional consideration									100,000,000
Gross expenditure for an appraisel well to be paid by Tullow as additional consideration									100,000,000
Percentage of participating interest share of costs associated with the concession obligated to be paid								40.00%
Period through which additional consideration is to be paid by Tullow									90 days
Transaction costs			$ 257,000						$ 3,300,000