Accrued Liabilities - Schedule of Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Jan. 31, 2018
Payables and Accruals [Abstract]
Accrued interest – 11.25% Senior Notes	$ 14,063	$ 14,063
Accrued well costs	13,577	8,932
Bonus payable	1,218	2,353
Other	5,240	1,557
Total accrued liabilities	$ 34,098	$ 26,905
11.25% Senior Notes
Debt Instrument [Line Items]
Debt instrument interest rate (as a percent)	11.25%		11.25%