Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net income (loss)	$ 36,714,000	$ (38,443,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization	24,656,000	14,005,000
Impairment of proved and unproved oil and gas properties	42,751,000	0
Impairment of goodwill	17,620,000	0
Accretion of asset retirement obligations	44,000	54,000
Settlement of asset retirement obligations	0	(62,000)
(Gain) loss on sale of oil and gas properties	(204,000)	125,000
Total (gain) loss on derivative contracts, net	(99,784,000)	47,894,000
Operating portion of net cash received in settlement of derivative contracts	9,739,000	5,362,000
Stock-based compensation	2,694,000	2,212,000
Deferred income taxes	1,092,000	(460,000)
Amortization of deferred financing costs	80,000	103,000
Changes in assets and liabilities:
(Increase) decrease in accounts receivable	13,780,000	(6,811,000)
(Increase) decrease in prepaid expenses and other current assets	(312,000)	(2,236,000)
Increase (decrease) in accounts payable and accrued expenses	2,846,000	(7,427,000)
Increase (decrease) in revenues and royalties payable	5,640,000	(5,383,000)
Increase (decrease) in advances	(8,814,000)	(1,882,000)
Net cash provided by operating activities	48,542,000	7,051,000
Cash flows from investing activities:
Additions to oil and gas properties	(39,299,000)	(48,412,000)
Additions to office and other equipment	(87,000)	(75,000)
Proceeds from sales of oil and gas properties	409,000	0
Net cash used in investing activities	(38,977,000)	(48,487,000)
Cash flows from financing activities:
Proceeds from borrowings	17,500,000	85,244,000
Repayments of borrowings	(35,500,000)	(43,247,000)
Cash paid related to the exchange and cancellation of Class A Common Stock	(214,000)	(397,000)
Cash paid for finance leases	(72,000)	(114,000)
Net cash (used in) provided by financing activities	(18,286,000)	41,486,000
Net increase (decrease) in cash	(8,721,000)	50,000
Cash at beginning of period	13,822,000	376,000
Cash at end of period	5,101,000	426,000
Cash paid for:
Interest	1,676,000	1,255,000
Non-cash investing and financing activities:
Accrued capital expenditures	31,011,000	17,040,000
Lease asset additions - ASC 842	0	1,801,000
Asset retirement obligations	$ 21,000	$ 21,000