CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
OPERATING ACTIVITIES FROM CONTINUING OPERATIONS:
Net loss	$ (3,944)	$ (8,171)
Income from discontinued operations	94	671
Net loss from continuing operations	(4,038)	(8,842)
Adjustments to reconcile net loss from continuing operations to net cash flow from operating activities:
Depreciation	3,234	3,820
Accrued interest added to principal	0	911
Change in fair value of warrant asset	420	0
Amortization of debt issuance costs	261	649
Impairment of long-lived assets	169	0
Gain on sale of assets	0	(1,744)
Stock-based compensation expense	1,070	481
Changes in operating assets and liabilities:
Accounts receivable	(216)	2,654
Emissions and carbon offset credits	(6,258)	300
Digital assets	46	329
Prepaids and other assets	626	1,420
Income tax receivable	0	798
Accounts payable	(317)	1,252
Accrued emissions	1,736	(970)
Accrued expenses	(1,850)	(5,101)
Other	127	3,436
Net cash flow used for operating activities from continuing operations	(4,990)	(607)
INVESTING ACTIVITIES FROM CONTINUING OPERATIONS:
Purchases of and deposits for property and equipment	(1,332)	(6,459)
Proceeds from sale of assets	380	592
Net cash flow used for investing activities from continuing operations	(952)	(5,867)
FINANCING ACTIVITIES FROM CONTINUING OPERATIONS:
Proceeds from issuance of common stock, net of issuance costs	1,038	8,096
Proceeds from issuance of common stock and pre-funded warrants	6,000	0
Principal payments on debt	0	(3,283)
Net cash flow provided by financing activities from continuing operations	7,038	4,813
Discontinued Operations:
Net cash flow from operating activities of discontinued operations	(71)	915
Net cash flow from investing activities of discontinued operations	0	2,575
Increase (decrease) in cash and cash equivalents from discontinued operations	(71)	3,490
CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	1,025	1,829
CASH, CASH EQUIVALENTS AND RESTRICTED CASH - beginning of year	13,312	15,217
CASH, CASH EQUIVALENTS AND RESTRICTED CASH - end of period	$ 14,337	$ 17,046