Quarterly report pursuant to Section 13 or 15(d)

Accrued Liabilities and Other (Schedule of Accrued Liabilities and Other Balances) (Details)

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Accrued Liabilities and Other (Schedule of Accrued Liabilities and Other Balances) (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Accrued Liabilities and Other [Abstract]    
Accrued accounts payable invoices $ 4,683 $ 4,650
Joint venture audit settlement   3,322
Gabon DMO, PID and PIH obligations 4,193 3,314
Capital expenditures 2,894 11,792
Stock appreciation rights 1,380 2,638
Accrued wages and other compensation 1,318 1,731
Other 1,831 2,326
Total accrued liabilities and other $ 16,299 $ 29,773