Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 2,842	$ 3,009
Restricted cash	4,281	3,417
Accounts receivable	19,937	29,889
Inventory	23,075	49,796
Parts and supplies	38,877	28,295
Contract asset - coal purchase agreement	0	19,567
Prepaid expenses	2,262	4,546
Total current assets	91,274	138,519
Property, plant and equipment:
Land and mineral rights	115,486	115,595
Buildings and equipment	537,131	534,129
Mine development	158,642	140,108
Finance lease right-of-use assets	12,346	0
Total property, plant and equipment	823,605	789,832
Less - accumulated depreciation, depletion and amortization	(334,971)	(309,370)
Total property, plant and equipment, net	488,634	480,462
Investment in Sunrise Energy	2,811	3,988
Other assets	7,061	7,585
Total assets	589,780	630,554
Current liabilities:
Current portion of bank debt, net	24,438	33,031
Accounts payable and accrued liabilities	62,908	82,972
Current portion of lease financing	3,933	0
Deferred revenue	23,062	35,485
Contract liability - power purchase agreement and capacity payment reduction	43,254	88,114
Total current liabilities	157,595	239,602
Long-term liabilities:
Bank debt, net	63,453	49,713
Convertible notes payable	10,000	10,000
Convertible notes payable - related party	9,000	9,000
Long-term lease financing	8,157	0
Deferred income taxes	9,235	4,606
Asset retirement obligations	14,538	17,254
Contract liability - power purchase agreement	47,425	84,096
Other	1,789	1,259
Total long-term liabilities	163,597	175,928
Total liabilities	321,192	415,530
Commitments and contingencies
Stockholders' equity:
Preferred stock, $.10 par value, 10,000 shares authorized; none issued	0	0
Common stock, $.01 par value, 100,000 shares authorized; 34,052 and 32,983 issued and outstanding, respectively	341	330
Additional paid-in capital	127,548	118,788
Retained earnings	140,699	95,906
Total stockholders’ equity	268,588	215,024
Total liabilities and stockholders’ equity	$ 589,780	$ 630,554