CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		15 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023
OPERATING ACTIVITIES FROM CONTINUING OPERATIONS:
Net loss	$ (10,042)	$ (107,882)	$ (18,213)	$ (108,311)
(Loss) income from discontinued operations, net of tax	(289)	1,153	382	2,471
Net loss from continuing operations	(9,753)	(109,035)	(18,595)	(110,782)
Adjustments to reconcile net loss from continuing operations to net cash flow from operating activities:
Depreciation			6,985	8,190
Impairment of long-lived assets	0	71,500	0	71,500
Interest expense added to principal			1,212	0
Deferred income taxes			0	15,038
Amortization of debt issuance costs			1,405	1,909
Gain on sale of assets	(8)	(629)	(1,752)	(629)
Remeasurement of environmental liability			0	11,109
Stock-based compensation expense			1,049	669
Professional fees paid in common stock			250	0
Changes in operating assets and liabilities:
Accounts receivable			2,519	(790)
Emissions and carbon offset credits			(337)	1,102
Digital assets			348	0
Prepaids and other assets			2,689	(2,496)
Income tax receivable			(59)	0
Accounts payable			2,101	(663)
Accrued emissions			38	1,256
Accrued expenses			(3,285)	7,061
Income tax payable			0	(2,344)
Other			2,674	11
Net cash flow used for operating activities from continuing operations			(2,758)	141
INVESTING ACTIVITIES FROM CONTINUING OPERATIONS:
Purchases of and deposits for property and equipment			(7,033)	(105,374)
Proceeds from sale of assets			592	1,136	$ 11,700
Proceeds from sale of marketable securities			0	496
Net cash flow used for investing activities from continuing operations			(6,441)	(103,742)
FINANCING ACTIVITIES FROM CONTINUING OPERATIONS:
Proceeds from issuance of common stock, net of issuance costs			11,165	5,869
Proceeds from stock options exercised			0	14
Restricted stock unit awards settled in cash for taxes			0	(65)
Proceeds from debt, net of issuance costs			0	96,605
Principal payments on debt			(5,304)	(17,574)
Repayments of lease obligations			0	(473)
Net cash flow provided by financing activities from continuing operations			5,861	84,376
Discontinued Operations:
Net cash flow from operating activities of discontinued operations			159	3,014
Net cash flow from investing activities of discontinued operations			3,325	(6)
Increase in cash and cash equivalents from discontinued operations			3,484	3,008
CHANGE IN CASH AND CASH EQUIVALENTS			146	(16,217)
CASH AND CASH EQUIVALENTS - beginning of year			15,217	82,599
CASH AND CASH EQUIVALENTS - end of period	$ 15,363	$ 66,382	$ 15,363	$ 66,382	$ 15,363