CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income (loss)	$ (30,088)	$ 117,962	$ (11,948)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, depletion, amortization, accretion and impairment of oil and gas properties	137,937	141,815	37,152
Deferred income taxes (benefit)	2,143	18,157	1,690
Stock-based compensation	6,301	6,522	1,245
(Gain) loss on disposition of property and equipment	(11,117)	499	(4,995)
(Gain) loss on derivative instruments	65,602	(92,534)	16,706
Net cash (paid) received in settlement of derivative instruments	(15,294)	(14,683)	74
Amortization of debt issuance costs	1,943	2,139	274
Write-off of undeveloped and exploratory costs	12,377	0	0
Settlement of asset retirement obligations	(7)	(801)	(840)
(Gain) loss from revaluation of tax receivable agreement liability	170	3,518	0
Changes in operating assets and liabilities:
Increase in accounts receivable and accounts receivable, related parties	(2,563)	(14,816)	(8,230)
Decrease (increase) in prepaid and other assets	259	(59)	(451)
Increase (decrease) in accounts payable and accrued liabilities and other	(180)	8,526	7,476
Increase (decrease) in accounts payable, related parties	(74)	64	(394)
Net cash provided by operating activities	167,409	176,309	37,759
Cash flows from investing activities:
Additions to oil and natural gas properties	(249,864)	(377,897)	(149,832)
Acquisition of White Wolf	0	(4,005)	(114,843)
Acquisition of land and leasehold, royalty and mineral interest	(1,262)	(15,281)	(6,500)
Proceeds received from disposition of oil and natural gas properties	21,770	0	6,252
Additions to other property and equipment	(1,039)	(2,160)	(574)
Proceeds from sale of other property and equipment	0	0	0
Net cash used in investing activities	(230,395)	(399,343)	(265,497)
Cash flows from financing activities:
Proceeds from revolving credit facility	128,000	274,000	66,000
Repayment on revolving credit facility	(62,000)	(80,000)	(121,000)
Proceeds from Class A Common Stock offering	0	40,511	0
Class A Common Stock offering issuance costs	0	(1,155)	0
Proceeds from issuance of Series A Preferred Stock and Warrants	0	0	95,000
Series A Preferred Stock issuance costs	0	0	(4,220)
Proceeds from issuance of Series B Preferred Stock	0	0	150,000
Series B Preferred Stock upfront fees and transaction costs	0	(20)	(10,017)
Proceeds from Second lien notes, net	0	0	97,000
Net proceeds from the Transaction	0	0	18,688
Distribution to noncontrolling interest	0	0	(40,487)
Distribution to Tema	0	0	(2,267)
Debt issuance costs	(799)	(3,330)	(4,640)
Dividends paid on preferred stock	(19,120)	(10,716)	(38)
Restricted stock used for tax withholdings	(246)	(749)	0
Payment on capital lease obligation	(15)	(32)	(33)
Net cash provided by financing activities	45,820	218,509	243,986
Net increase (decrease) in cash, cash equivalents, and restricted cash	(17,166)	(4,525)	16,248
Cash, cash equivalents and restricted cash beginning of period	20,157	24,682	8,434
Cash, cash equivalents and restricted cash end of period	2,991	20,157	24,682
Supplemental disclosures:
Cash paid for interest	23,305	17,065	1,889
Supplemental noncash activity:
Asset retirement obligations incurred, net of revision of estimates	(308)	4,697	5,766
Changes in accrued capital expenditures	7,498	14,516	42,602
Changes in accounts payable for capital expenditures	6,712	7,456	25,541
Total cash, cash equivalents and restricted cash	2,991	20,157	24,682
Series A Preferred Stock
Supplemental noncash activity:
Series A Preferred Stock dividends paid-in-kind	4,141	3,971	5,530
Series B Preferred Stock
Supplemental noncash activity:
Series B Preferred Stock dividends paid-in-kind	0	6,120	626
Series B Preferred Stock deemed dividend	$ 1,529	$ 1,345	$ 174