CONDOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
OPERATING ACTIVITIES FROM CONTINUING OPERATIONS:
Net loss	$ (29,510)	$ (271,068)
Loss from discontinued operations, net of tax	(471)	(1,327)
Net loss from continuing operations	(29,039)	(269,741)
Adjustments to reconcile net loss from continuing operations to net cash flow from operating activities:
Depreciation and amortization	13,602	35,136
Deferred income taxes	0	15,055
Impairment of long-lived assets	4,000	176,307
Other non-cash affecting net income	0	2,097
Amortization of debt issuance costs	2,611	3,946
Loss on debt extinguishment	591	0
Stock-based compensation expense	2,344	2,636
Remeasurement of environmental liability	2,409	16,694
Professional fees paid in common stock	250	0
Gain on sale of assets	(9,903)	(1,780)
Changes in operating assets and liabilities:
Accounts receivable	2,338	(2,459)
Digital Assets	1	0
Emissions and carbon offset credits	(4,434)	1,101
Prepaid expenses and other assets	2,829	1,218
Accounts payable	(2,748)	(48)
Accrued emissions expense	4,468	3,418
Accrued expenses	(3,407)	4,644
Income taxes payable and receivable	(59)	(3,142)
Other long-term liabilities	2,543	0
Other	(551)	433
Net cash flow used for by operating activities from continuing operations	(12,155)	(14,485)
INVESTING ACTIVITIES FROM CONTINUING OPERATIONS:
Purchases of and deposits for property and equipment	(13,015)	(132,950)
Proceeds from sale of assets	6,984	11,100
Proceeds from sale of short term investments	0	496
Net cash flow used for investing activities from continuing operations	(6,031)	(121,354)
FINANCING ACTIVITIES FROM CONTINUING OPERATIONS:
Proceeds from issuance of common stock, net of issuance costs	20,581	9,531
Proceeds from stock options exercised	0	14
Restricted stock unit awards settled in cash for taxes	0	(227)
Proceeds from debt, net of issuance costs	0	107,105
Principal payments on debt	(6,809)	(53,923)
Repayments of finance lease obligations	0	(363)
Net cash flow provided by financing activities from continuing operations	13,772	62,137
Discontinued Operations:
Net cash flow from operating activities of discontinued operations	(816)	6,320
Net cash flow from investing activities of discontinued operations	3,325	0
Increase in cash and cash equivalents from discontinued operations	2,509	6,320
CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(1,905)	(67,382)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH - beginning of year	15,217	82,599
CASH, CASH EQUIVALENTS AND RESTRICTED CASH - end of year	$ 13,312	$ 15,217