Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
OPERATING ACTIVITIES:
Net income (loss)	$ 1,612	$ 7,986	$ (11,908)	$ 3,990
Deferred income taxes	596	(1,359)	840	(2,691)
Equity income – Sunrise Energy	(168)	(90)	(506)	(153)
Depreciation, depletion and amortization	11,187	9,842	31,882	29,864
Gain on sale of assets			(367)	0
Gain on extinguishment of debt	0	(10,000)	0	(10,000)
Amortization of debt issuance costs	995	657	2,503	1,908
Asset retirement obligations accretion	255	380	751	1,116
Cash paid on asset retirement obligation reclamation			(2,483)	0
Stock-based compensation			230	834
Provision for loss on customer contracts			159	0
Change in operating assets and liabilities:
Accounts receivable			(3,160)	(2,041)
Inventory			(6,035)	13,341
Parts and supplies			(4,975)	(918)
Prepaid expenses			(2,390)	(4,631)
Accounts payable and accrued liabilities			9,318	8,960
Other			943	161
Cash provided by operating activities			13,935	37,031
INVESTING ACTIVITIES:
Capital expenditures			(38,344)	(18,075)
Proceeds from sale of equipment			758	0
Cash used in investing activities			(37,586)	(18,075)
FINANCING ACTIVITIES:
Payments on bank debt			(35,713)	(37,062)
Borrowings of bank debt			37,700	14,250
Debt issuance costs			(2,097)	(418)
Distributions to redeemable noncontrolling interests	(600)		(585)	0
Taxes paid on vesting of RSUs			0	(2)
Cash provided by (used in) financing activities			28,305	(23,232)
Increase (decrease) in cash, cash equivalents, and restricted cash			4,654	(4,276)
Cash, cash equivalents, and restricted cash, beginning of period			5,829	12,071
Cash, cash equivalents, and restricted cash, end of period	10,483	7,795	10,483	7,795
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH CONSIST OF THE FOLLOWING:
Cash and cash equivalents	7,000	4,546	7,000	4,546
Restricted cash	3,483	3,249	3,483	3,249
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Ending Balance	$ 10,483	$ 7,795	10,483	7,795
SUPPLEMENTAL CASH FLOW INFORMATION:
Cash paid for interest			4,791	6,728
SUPPLEMENTAL NON-CASH FLOW INFORMATION:
Change in capital expenditures included in accounts payable and prepaid expense			2,396	5,782
Convertible notes payable and related party convertible notes payable converted to common stock			10,000	0
Senior Unsecured Convertible Notes [Member] | Non-affiliated Party [Member]
FINANCING ACTIVITIES:
Issuance of convertible note payable			11,000	0
Senior Unsecured Convertible Notes [Member] | Four Board Members [Member]
FINANCING ACTIVITIES:
Issuance of related party convertible notes payable			18,000	0
Interest Rate Swap [Member]
OPERATING ACTIVITIES:
Change in fair value of derivative			(867)	(2,330)
Fuel Hedge [Member]
OPERATING ACTIVITIES:
Change in fair value of derivative			$ 0	$ (379)