Accounts Payable and Accrued Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Summary of Accounts payable and accrued liabilities
Accounts payable	$ 770	$ 2,789
Oil and gas revenue payable to oil and gas property owners	1,969	964
Production taxes payable	59	43
Accrued drilling costs	517	190
Accrued lease operating costs	58	585
Accrued ad valorem taxes	407	395
Accrued general and administrative expenses	574	722
Other accrued liabilities	139	168
Total accounts payable and accrued liabilities	$ 4,493	$ 5,856