CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
OPERATING ACTIVITIES FROM CONTINUING OPERATIONS:
Net loss	$ (32,452)	$ (131,488)
(Loss) income from discontinued operations, net of tax	(696)	3,207
Net loss from continuing operations	(31,756)	(134,695)
Adjustments to reconcile net loss from continuing operations to net cash flow from operating activities:
Depreciation	10,368	21,701
Impairment of long-lived assets	4,000	71,500
Interest expense added to principal	1,212	0
Deferred income taxes	0	15,016
Amortization of debt issuance costs	2,137	3,059
Impairment of digital assets	0	85
Gain on sale of assets	(1,752)	130
Remeasurement of environmental liability	1,600	11,109
Stock-based compensation expense	1,531	1,029
Professional fees paid in common stock	250	0
Changes in operating assets and liabilities:
Accounts receivable	2,421	(40)
Emissions and carbon offset credits	(337)	1,102
Digital assets	348	0
Prepaids and other assets	(1,801)	(174)
Income tax receivable	(59)	0
Accounts payable	7,518	(1,627)
Accrued emissions	1,872	2,592
Accrued expenses	(2,717)	5,111
Income tax payable	0	(2,344)
Other long-term liabilities	4,713	0
Other	(458)	392
Net cash flow used for operating activities from continuing operations	(910)	(6,054)
INVESTING ACTIVITIES FROM CONTINUING OPERATIONS:
Purchases of and deposits for property and equipment	(10,952)	(127,368)
Proceeds from sale of assets	600	4,802
Proceeds from sale of marketable securities	0	496
Net cash flow used for investing activities from continuing operations	(10,352)	(122,070)
FINANCING ACTIVITIES FROM CONTINUING OPERATIONS:
Proceeds from issuance of common stock, net of issuance costs	11,475	7,783
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	107,105
Principal payments on debt	(6,809)	(35,258)
Repayments of lease obligations	0	(363)
Net cash flow provided by financing activities from continuing operations	4,666	79,216
Discontinued Operations:
Net cash flow from operating activities of discontinued operations	(1,259)	4,828
Net cash flow from investing activities of discontinued operations	3,325	(6)
Increase in cash and cash equivalents from discontinued operations	2,066	4,822
CHANGE IN CASH, RESTRICTED CASH AND CASH EQUIVALENTS	(4,530)	(44,086)
CASH, RESTRICTED CASH AND CASH EQUIVALENTS - beginning of year	15,217	82,599
CASH, RESTRICTED CASH AND CASH EQUIVALENTS - end of period	$ 10,687	$ 38,513