Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net income (loss)	$ (35,909,000)	$ 19,536,000	$ 805,000	$ (18,907,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization	22,902,000	14,197,000	47,558,000	28,202,000
Impairment of proved and unproved oil and gas properties			42,813,000	0
Impairment of goodwill	0	0	17,620,000	0
Accretion of asset retirement obligations	46,000	54,000	90,000	108,000
Settlement of asset retirement obligations			0	(179,000)
(Gain) loss on sale of oil and gas properties	6,000	201,000	(198,000)	326,000
Total (gain) loss on derivative contracts, net	20,679,000	(9,496,000)	(79,105,000)	38,398,000
Operating portion of net cash received in settlement of derivative contracts			39,096,000	9,956,000
Stock-based compensation			5,262,000	4,473,000
Deferred income taxes			(18,000)	153,000
Amortization of deferred financing costs	100,000	100,000	161,000	215,000
Changes in assets and liabilities:
(Increase) decrease in accounts receivable			15,060,000	(1,257,000)
(Increase) decrease in prepaid expenses and other current assets			(747,000)	(537,000)
Increase (decrease) in accounts payable and accrued expenses			(3,410,000)	(5,222,000)
Increase (decrease) in revenues and royalties payable			(16,491,000)	(3,845,000)
Increase (decrease) in advances			(11,412,000)	3,400,000
Net cash provided by operating activities			57,084,000	55,284,000
Cash flows from investing activities:
Additions to oil and gas properties			(67,493,000)	(79,760,000)
Additions to office and other equipment			(108,000)	(202,000)
Proceeds from sales of oil and gas properties			409,000	2,000
Net cash used in investing activities			(67,192,000)	(79,960,000)
Cash flows from financing activities:
Proceeds from borrowings			69,906,000	128,087,000
Repayments of borrowings			(71,318,000)	(96,915,000)
Cash paid related to the exchange and cancellation of Class A Common Stock			(382,000)	(661,000)
Cash paid for finance leases			(110,000)	(237,000)
Deferred financing costs			0	(189,000)
Net cash (used in) provided by financing activities			(1,904,000)	30,085,000
Net (decrease) increase in cash			(12,012,000)	5,409,000
Cash at beginning of period			13,822,000	376,000
Cash at end of period	$ 1,810,000	$ 5,785,000	1,810,000	5,785,000
Cash paid for:
Interest			2,659,000	2,760,000
Non-cash investing and financing activities:
Accrued capital expenditures			6,220,000	16,714,000
Lease asset additions - ASC 842			0	1,573,000
Asset retirement obligations			$ 43,000	$ 23,000