Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 8,882	$ 2,546
Restricted cash	3,491	3,283
Accounts receivable	17,155	13,584
Inventory	13,806	7,699
Parts and supplies	12,247	10,015
Prepaid expenses	999	2,112
Total current assets	56,580	39,239
Property, plant and equipment:
Land and mineral rights	115,771	115,837
Buildings and equipment	355,053	342,782
Mine development	123,274	112,575
Total property, plant and equipment	594,098	571,194
Less - accumulated depreciation, depletion and amortization	(286,960)	(268,370)
Total property, plant and equipment, net	307,138	302,824
Investment in Sunrise Energy	3,883	3,545
Other assets	8,134	8,372
Total Assets	375,735	353,980
Current liabilities:
Current portion of bank debt, net	13,222	23,098
Accounts payable and accrued liabilities	47,973	41,528
Total current liabilities	61,195	64,626
Long-term liabilities:
Bank debt, net	113,607	84,667
Deferred income taxes	3,094	2,850
Asset retirement obligations	13,437	14,025
Other	1,579	1,577
Total long-term liabilities	131,717	103,119
Total liabilities	192,912	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; 32,983 and 30,785 issued and outstanding, respectively	330	308
Additional paid-in capital	114,212	104,126
Retained earnings	64,281	77,801
Total stockholders’ equity	178,823	182,235
Total liabilities, redeemable noncontrolling interests, and stockholders’ equity	$ 375,735	$ 353,980