Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 3,009	$ 2,546
Restricted cash	3,417	3,283
Accounts receivable	29,889	13,584
Inventory	49,796	7,699
Parts and supplies	28,295	10,015
Contract asset - coal purchase agreement	19,567	0
Prepaid expenses	4,546	2,112
Total current assets	138,519	39,239
Property, plant and equipment:
Land and mineral rights	115,595	115,837
Buildings and equipment	534,129	342,782
Mine development	140,108	112,575
Total property, plant and equipment	789,832	571,194
Less - accumulated depreciation, depletion and amortization	(309,370)	(268,370)
Total property, plant and equipment, net	480,462	302,824
Investment in Sunrise Energy	3,988	3,545
Other assets	7,585	8,372
Total assets	630,554	353,980
Current liabilities:
Current portion of bank debt, net	33,031	23,098
Accounts payable and accrued liabilities	82,972	41,528
Deferred revenue	35,485	0
Contract liability - power purchase agreement and capacity payment reduction	88,114	0
Total current liabilities	239,602	64,626
Long-term liabilities:
Bank debt, net	49,713	84,667
Convertible notes payable	10,000	0
Convertible notes payable - related party	9,000	0
Deferred income taxes	4,606	2,850
Asset retirement obligations	17,254	14,025
Contract liability - power purchase agreement	84,096	0
Other	1,259	1,577
Total long-term liabilities	175,928	103,119
Total liabilities	415,530	167,745
Commitments and contingencies
Redeemable noncontrolling interests	0	4,000
Stockholders' equity:
Preferred stock, $.10 par value, 10,000 shares authorized; none issued	0	0
Common stock, $.01 par value, 100,000 shares authorized; 32,983 and 30,785 issued and outstanding, respectively	330	308
Additional paid-in capital	118,788	104,126
Retained earnings	95,906	77,801
Total stockholders’ equity	215,024	182,235
Total liabilities, redeemable noncontrolling interests, and stockholders’ equity	$ 630,554	$ 353,980