SUBSEQUENT EVENTS (Details)	Dec. 31, 2012	Dec. 31, 2011	Dec. 02, 2010	Jul. 31, 2010 acre	Nov. 05, 2009	Dec. 31, 2012 Amendments to 2008 Equity Incentive Plan [Member]	Mar. 31, 2013 Subsequent Events [Member] acre	Dec. 31, 2012 Subsequent Events [Member]	Mar. 31, 2013 Subsequent Events [Member] Amendments to 2008 Equity Incentive Plan [Member]
Subsequent Event [Line Items]
Gas and oil area in CPO 4 Block (in acres)				345,452			345,452
Percentage of ownership interest acquired in CPO 4 Block (in hundredths)	1.60%		37.50%		25.00%		37.50%
Common stock, authorized (in shares)	100,000,000	100,000,000					150,000,000	100,000,000
Number of shares of common stock authorized (in shares)						6,000,000			6,000,000