Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 4,289	$ 2,546
Restricted cash	3,288	3,283
Accounts receivable	15,407	13,584
Inventory	8,775	7,699
Parts and supplies	11,470	10,015
Prepaid expenses	1,195	2,112
Total current assets	44,424	39,239
Property, plant and equipment:
Land and mineral rights	115,839	115,837
Buildings and equipment	346,932	342,782
Mine development	116,198	112,575
Total property, plant and equipment	578,969	571,194
Less - accumulated depreciation, depletion and amortization	(277,545)	(268,370)
Total property, plant and equipment, net	301,424	302,824
Investment in Sunrise Energy	3,695	3,545
Other assets	8,333	8,372
Total Assets	357,876	353,980
Current liabilities:
Current portion of bank debt, net	116,178	23,098
Accounts payable and accrued liabilities	47,726	41,528
Total current liabilities	163,904	64,626
Long-term liabilities:
Bank debt, net	0	84,667
Deferred income taxes	2,673	2,850
Asset retirement obligations	13,668	14,025
Other	1,475	1,577
Total long-term liabilities	17,816	103,119
Total liabilities	181,720	167,745
Redeemable noncontrolling interests	4,000	4,000
Stockholders' equity:
Preferred stock, $.10 par value, 10,000 shares authorized; none issued and outstanding	0	0
Common stock, $.01 par value, 100,000 shares authorized; 30,785 issued and outstanding	308	308
Additional paid-in capital	104,181	104,126
Retained earnings	67,667	77,801
Total stockholders’ equity	172,156	182,235
Total liabilities, redeemable noncontrolling interests, and stockholders’ equity	$ 357,876	$ 353,980