Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
OPERATING ACTIVITIES:
Net income (loss)	$ 22,051	$ (10,134)
Deferred income taxes	2,920	(177)
Equity income – Sunrise Energy	(69)	(150)
Cash distribution - Sunrise Energy	625	0
Depreciation, depletion and amortization	17,976	9,531
Loss on sale of assets	21	57
Amortization of debt issuance costs	1,212	691
Asset retirement obligations accretion	451	246
Cash paid on asset retirement obligation reclamation	(365)	(703)
Stock-based compensation	1,220	55
Provision for loss on customer contracts	0	159
Amortization of contract asset and contract liabilities	(15,569)
Other	451	163
Change in operating assets and liabilities:
Accounts receivable	(3,269)	(1,823)
Inventory	(4,004)	(1,076)
Parts and supplies	(2,926)	(1,455)
Prepaid expenses	389	1,647
Accounts payable and accrued liabilities	2,009	6,563
Deferred revenue	2,989	0
Cash provided by operating activities	26,112	2,977
INVESTING ACTIVITIES:
Capital expenditures	(13,482)	(9,082)
Proceeds from sale of equipment	15	131
Cash used in investing activities	(13,467)	(8,951)
FINANCING ACTIVITIES:
Payments on bank debt	(27,013)	(9,188)
Borrowings of bank debt	17,000	17,500
Debt issuance costs	(1,600)	(590)
Taxes paid on vesting of RSUs	(1,109)	0
Cash (used in) provided by financing activities	(12,722)	7,722
(Decrease) increase in cash, cash equivalents, and restricted cash	(77)	1,748
Cash, cash equivalents, and restricted cash, beginning of period	6,426	5,829
Cash, cash equivalents, and restricted cash, end of period	6,349	7,577
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH CONSIST OF THE FOLLOWING:
Cash and cash equivalents	2,441	4,289
Restricted cash	3,908	3,288
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	6,349	7,577
SUPPLEMENTAL CASH FLOW INFORMATION:
Cash paid for interest	3,116	2,044
SUPPLEMENTAL NON-CASH FLOW INFORMATION:
Change in capital expenditures included in accounts payable and prepaid expense	120	641
Change in capital expenditures included in accounts payable and prepaid expense	(120)	(641)
Interest Rate Swap [Member]
OPERATING ACTIVITIES:
Change in fair value of interest rate swaps	$ 0	$ (617)