Annual report pursuant to Section 13 and 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
Dec. 31, 2020
Dec. 31, 2019
Accrued Liabilities and Other [Abstract]    
Accrued accounts payable invoices $ 4,070 $ 4,650
Joint venture audit settlement   3,322
Gabon DMO, PID and PIH obligations 3,960 3,314
Capital expenditures 435 11,792
Stock appreciation rights - current portion 2,289 2,638
Accrued wages and other compensation 2,108 1,731
Other 4,322 2,326
Total accrued liabilities and other $ 17,184 $ 29,773