Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets:
Net operating loss carry-forward	$ 20,892	$ 17,196
Asset retirement obligation	3,022	2,980
Stock-based compensation	963	940
Accrued compensation	25	28
Net gas imbalance	134	139
Other	64	63
Total	25,100	21,346
Deferred tax liabilities:
Derivative instruments	(65)	(2,393)
Net basis difference in oil and gas properties	(26,271)	(26,849)
Net deferred tax liability	$ (1,236)	$ (7,896)