Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income (loss)	$ 242,168	$ 116,738	$ (277,353)
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Provision for doubtful accounts	0	(2,329)	3,202
Depreciation, depletion and amortization	17,884	15,445	58,085
Impairment	0	0	256,399
Deferred income taxes	(64,529)	0	0
Debt issuance costs amortization	0	57	792
Write off of debt issuance costs	0	174	0
(Gain) loss on derivative contracts	(5,975)	2,251	(5,765)
Cash (paid) received on settlement of derivative contracts	1,525	(2,230)	5,879
Gain on sale of assets	0	(18,952)	(100)
Stock-based compensation	1,526	1,394	3,012
Other	153	144	149
Changes in operating assets and liabilities increasing (decreasing) cash
Receivables	(13,211)	841	5,867
Prepaid expenses	(1,507)	2,264	452
Other current assets	(5,378)	0	458
Other assets and liabilities, net	(129)	(1,212)	1,134
Accounts payable and accrued expenses	(5,246)	(2,241)	(12,968)
Asset retirement obligations	(2,585)	(2,084)	(3,081)
Net cash provided by operating activities	164,696	110,260	36,162
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures for property, plant and equipment	(44,085)	(11,583)	(8,762)
Acquisitions of assets	(1,431)	(3,545)	(3,701)
Purchase of other property and equipment	(49)	(59)	0
Proceeds from sale of assets	448	38,160	37,556
Net cash (used in) provided by investing activities	(45,117)	22,973	25,093
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from borrowings	0	0	59,000
Repayments of borrowings	0	(20,000)	(96,500)
Debt issuance costs	0	(75)	(160)
Reduction of financing lease liability	(541)	(1,024)	(1,233)
Proceeds from exercise of stock options	77	23	0
Tax withholdings paid in exchange for shares withheld on employee vested stock awards	(1,177)	(899)	(64)
Cash received on warrant exercises	6	0
Net cash (used in) financing activities	(1,635)	(21,975)	(38,957)
NET INCREASE IN CASH, CASH EQUIVALENTS and RESTRICTED CASH	117,944	111,258	22,298
CASH, CASH EQUIVALENTS and RESTRICTED CASH, beginning of year	139,524	28,266	5,968
CASH, CASH EQUIVALENTS and RESTRICTED CASH, end of year	$ 257,468	$ 139,524	$ 28,266