Annual report pursuant to Section 13 and 15(d)

Accounts Payable and Accrued Liabilities (Details)

v3.8.0.1
Accounts Payable and Accrued Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Accounts Payable and Accrued Liabilities [Abstract]    
Accounts payable $ 840 $ 725
Severance and ad valorem tax payable 975 1,649
Payroll and other taxes 1,224 1,251
Accounts payable and accrued liabilities $ 3,039 $ 3,625