Accrued Liabilities - Schedule of Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Payables and Accruals [Abstract]
Bonus payable	$ 1,363	$ 2,353
Accrued interest - 11.25% Senior Notes	0	14,063
Accrued well costs	1,752	8,932
Third party payments for joint interest expenditures	5,178	0
Accrued professional fees (success fees)	4,710	0
Other	2,980	1,557
Total accrued liabilities	$ 15,983	$ 26,905