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Accrued Liabilities - Schedule of Accrued Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Payables and Accruals [Abstract]    
Bonus payable $ 1,231 $ 1,363
Accrued well costs 9,160 1,752
Third-party payments for joint-interest expenditures 1,017 5,178
Accrued professional fees (success fees) 0 4,710
Ad valorem payable 2,307 869
Other 1,879 2,111
Total accrued liabilities $ 15,594 $ 15,983