Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Accounts Payable and Accrued Liabilities [Abstract]
Accounts payable	$ 1,809	$ 2,315
Oil and gas revenue payable to oil and gas property owners	1,770	1,415
Gathering and transportation payables	430	468
Production taxes payable	238	113
Drilling advances received from joint venture partner	778	955
Accrued drilling costs		4
Accrued lease operating costs	272	282
Accrued ad valorem taxes	1,522	1,552
Accrued general and administrative expenses	864	1,572
Accrued interest	185	184
Other liabilities	342	261
Total accounts payable and accrued liabilities	$ 8,210	$ 9,121