Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income (loss)	$ 60,857	$ 242,168	$ 116,738
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Provision for expected credit losses	0	0	(2,329)
Depreciation, depletion and amortization	22,176	17,884	15,445
Deferred income taxes	13,960	(64,529)	0
Debt issuance costs amortization	0	0	57
Write off of debt issuance costs	0	0	174
(Gain) loss on derivative contracts	(1,447)	(5,975)	2,251
Settlement gains (losses) on derivative contracts	5,876	1,525	(2,230)
(Gain) on sale of assets	0	0	(18,952)
Stock-based compensation	1,945	1,526	1,394
Other	159	153	144
Changes in operating assets and liabilities increasing (decreasing) cash
Receivables	12,130	(13,211)	841
Prepaid expenses	93	(1,507)	2,264
Other current assets	2,203	(5,378)	0
Other assets and liabilities, net	(56)	(129)	(1,212)
Accounts payable and accrued expenses	(1,409)	(5,246)	(2,241)
Asset retirement obligations	(909)	(2,585)	(2,084)
Net cash provided by operating activities	115,578	164,696	110,260
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures for property, plant and equipment	(26,375)	(44,085)	(11,583)
Acquisitions of assets	(11,232)	(1,431)	(3,545)
Purchase of other property and equipment	(29)	(49)	(59)
Proceeds from sale of assets	1,472	448	38,160
Net cash (used in) provided by investing activities	(36,164)	(45,117)	22,973
CASH FLOWS FROM FINANCING ACTIVITIES
Dividends paid to shareholders	(81,515)	0	0
Repayments of borrowings	0	0	(20,000)
Debt issuance costs	0	0	(75)
Reduction of financing lease liability	(588)	(541)	(1,024)
Proceeds from exercise of stock options	94	77	23
Tax withholdings paid in exchange for shares withheld on employee vested stock awards	(929)	(1,177)	(899)
Cash received on warrant exercises	0	6	0
Net cash (used in) financing activities	(82,938)	(1,635)	(21,975)
NET (DECREASE) INCREASE IN CASH, CASH EQUIVALENTS and RESTRICTED CASH	(3,524)	117,944	111,258
CASH, CASH EQUIVALENTS and RESTRICTED CASH, beginning of year	257,468	139,524	28,266
CASH, CASH EQUIVALENTS and RESTRICTED CASH, end of year	$ 253,944	$ 257,468	$ 139,524