Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
CURRENT ASSETS:
Cash and cash equivalents	$ 96,453	$ 82,599
Short term investments		496
Digital assets	393	476
Accounts receivable	5,569	5,524
Prepaid expenses	10,286	9,146
Emissions and carbon offset credits	1,025	2,361
Total current assets	113,726	100,602
LONG-TERM ASSETS:
Property and equipment, net	292,051	217,091
Right-of-use assets	1,375	1,472
Intangible assets, net	3,305	3,537
Goodwill	3,062	3,062
Deferred tax assets	16,846	15,058
Other long-term assets	989	445
Total assets	431,354	341,267
CURRENT LIABILITIES:
Accounts payable	14,823	5,923
Accrued emissions expense	2,637	2,634
Accrued expenses	11,676	10,375
Income taxes payable	3,879	2,481
Long-term debt, current portion	66,729	19,577
Lease obligation, current portion	500	736
Total current liabilities	100,244	41,726
LONG-TERM LIABILITIES:
Long-term debt, net of current portion and deferred financing fees	103,191	75,251
Lease obligation, net of current portion	195	193
Asset retirement obligations	2,691	2,691
Environmental liability	8,615	8,615
Other long-term liabilities	366	368
Total liabilities	215,302	128,844
COMMITMENTS AND CONTINGENCIES (NOTE 13)
STOCKHOLDERS' EQUITY:
Preferred stock
Common stock	4	4
Additional paid-in capital	285,905	281,815
Cumulative translation adjustment	(32)
Accumulated deficit	(69,825)	(69,396)
Total stockholders' equity	216,052	212,423
Total liabilities and stockholders' equity	$ 431,354	$ 341,267