Consolidated Statements of Cash Flows - USD ($) $ in Thousands	1 Months Ended	11 Months Ended	12 Months Ended
	Dec. 31, 2020	Nov. 30, 2020	Dec. 31, 2019
Cash flows from operating activities
Net loss	$ (716)	$ (118,139)	$ (103,019)
Adjustments to reconcile net loss to net cash provided by operating activities
Unamortized discounts and debt issuance costs	0	(85,483)	0
Depreciation, depletion and amortization	2,093	70,122	88,618
Stock-based compensation	0	(2,091)	1,822
Deferred taxes	0	(931)	(11,440)
Loss (gain) on derivative financial instruments	3,743	(66,699)	30,861
Settlements of derivative financial instruments	0	66,761	(3,550)
Impairment of oil and natural gas properties	0	199,908	48,412
Loss on sale or abandonment of property and equipment	0	1,337	34,560
Non-cash interest expense	131	2,002	2,652
Unrealized gain on warrants	0	(363)	(691)
Changes in operating assets and liabilities
Accounts receivable	3,499	(2,146)	(4,481)
Prepaid expenses and other assets	(49)	2,233	(623)
Accounts payable and accrued expenses	4,286	21,725	(2,799)
Net cash provided by operating activities	12,987	88,236	80,322
Cash flows from investing activities
Acquisition of oil and gas properties	(53)	(2,902)	(5,642)
Development of oil and gas properties	(247)	(100,436)	(148,438)
Proceeds from sales of oil and gas properties	0	11,913	11,470
Purchases of other property and equipment	(5)	(1,007)	(3,682)
Net cash used in investing activities	(305)	(92,432)	(146,292)
Cash flows from financing activities
Proceeds from borrowings	0	332,759	139,000
Payments on borrowings	(5,021)	(308,205)	(75,248)
Payments of financing fees	0	(4,710)	0
Net cash (used) provided by financing activities	(5,021)	19,844	63,752
Increase (decrease) in cash, cash equivalents and restricted cash	7,661	15,648	(2,218)
Cash, cash equivalents and restricted cash at beginning of the period	18,785	3,137	5,355
Cash, cash equivalents and restricted cash at end of the period	26,446	18,785	3,137
Supplemental information:
Cash paid for taxes	0	0	38
Cash received for income tax refunds	4,690	0	0
Cash paid for interest	0	28,081	41,217
Non-cash investing and financing activities:
Asset retirement obligation	177	(3,013)	(440)
Increase (decrease) in liabilities for capital expenditures	239	(39,501)	17,993
Conversion of senior notes and preferred stock into common stock	$ 0	$ 91,864	$ 0