Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net loss	$ (272,121)	$ (4,143)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Stock-based compensation	6,506	9,000
Bad debt recovery	422	106
Amortization of debt issuance cost and accretion of debt discount	2,460	15,656
Payable in-kind interest	1,590	12,213
Loss on early extinguishment of debt	1,299	20,370
Loss (gain) from commodity derivatives, net	8,985	(55)
Net settlements paid on commodity derivatives	(3,214)	(2,742)
Change in fair value of financial instruments	3,573	(58,343)
Deferred revenue realized	(232)	0
Impairment of oil and natural gas properties	228,324	0
Depreciation, depletion, amortization and accretion	33,252	25,367
Operating lease ROU amortization	(453)	0
Changes in operating assets and liabilities:
Accounts receivable	(6,378)	(13,226)
Prepaid expenses and other assets	(944)	(473)
Accounts payable and accrued liabilities	(31,393)	53,402
Proceeds from options associated with future midstream services	2,500	35,000
Net cash (used in) provided by operating activities	(25,824)	92,132
Cash flows from investing activities:
Acquisition of oil and natural gas properties	0	(92,410)
Proceeds from the sale of assets	16,851	17,500
Capital expenditures	(82,378)	(168,025)
Net cash used in investing activities	(65,527)	(242,935)
Cash flows from financing activities:
Proceeds from term loans, net of financing costs	0	47,806
Proceeds from revolving credit agreement, net of financing costs	56,883	72,566
Repayment of term loans and notes payable	0	(88,836)
Repayment of revolving credit agreement	(18,000)	0
Proceeds from the issuance of Series C Preferred Stock	0	122,418
Proceeds from the Värde financing arrangement, net of transaction costs	38,230	0
Partial repayment of the Värde financing arrangement	(2,600)	0
Repurchase of common stock	0	(997)
Proceeds from exercise of warrants and stock options	0	3,751
Payment for tax withholding on stock-based compensation	(546)	(2,230)
Net cash provided by financing activities	73,967	154,478
Net increase (decrease) in cash and cash equivalents	(17,384)	3,675
Cash and cash equivalents at beginning of period	21,137	17,462
Cash and cash equivalents at end of period	3,753	21,137
Supplemental disclosure:
Cash paid for interest	$ 6,488	$ 4,958