Accrued Liabilities (Accrued Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Accrued Liabilities [Abstract]
Employee costs	$ 7,708	$ 10,005
Lease operating expenses	3,910	3,451
Capital expenditures	4,715	3,962
Taxes	1,481	3,320
Interest payable	96	296
Other	1,259	1,416
Total accrued liabilities	$ 19,169	$ 22,450