Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities
Net loss	$ (110,791)	$ (58,564)
Adjustments to reconcile net loss to net cash provided by operating activities:
Accretion of asset retirement obligations	86	79
Depreciation, depletion and amortization	24,268	17,891
Stock-based compensation	(2,022)	533
Deferred taxes	(1,376)	(12,922)
(Gain) loss on derivative financial instruments	(101,169)	36,238
Settlements of derivative financial instruments	1,096	1,309
Impairment of oil and gas properties	199,908	0
Gain on disposal of property and equipment	83	(17)
Loss on sale of oil and gas properties	0	32,894
Non-cash interest expense	768	699
Change in fair value of warrants	(363)	102
Changes in operating assets and liabilities:
Accounts receivable	6,117	(2,016)
Prepaid expenses and other assets	(374)	304
Accounts payable and accrued expenses	(2,396)	(6,704)
Net cash provided by operating activities	13,835	9,826
Cash flows from investing activities
Acquisition of oil and gas properties	(816)	(2,352)
Development of oil and gas properties	(34,753)	(29,137)
Proceeds from sale of oil and gas properties	317	12,107
Purchases of other property and equipment	(524)	(2,916)
Net cash used in investing activities	(35,776)	(22,298)
Cash flows from financing activities
Proceeds from borrowings	28,000	30,000
Payments on borrowings	(8,054)	(19,116)
Net cash provided by financing activities	19,946	10,884
Net decrease in cash and cash equivalents	(1,995)	(1,588)
Cash and cash equivalents, beginning of the period	3,137	5,355
Cash and cash equivalents, end of the period	1,142	3,767
Supplemental information:
Cash paid for interest	3,957	16,743
Non-cash investing and financing activities:
Change in asset retirement obligation	(253)	(522)
Change in liabilities for capital expenditures	$ (1,040)	$ 730