Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 4,546	$ 8,041
Restricted cash	3,249	4,030
Accounts receivable	16,455	14,414
Inventory	11,322	24,663
Parts and supplies	9,821	8,903
Prepaid expenses	3,687	3,282
Total current assets	49,080	63,333
Property, plant and equipment, at cost:
Land and mineral rights	115,859	115,853
Buildings and equipment	361,570	352,115
Mine development	105,855	93,635
Total property, plant and equipment, at cost	583,284	561,603
Less - accumulated depreciation, depletion and amortization	(281,041)	(252,245)
Total property, plant and equipment, net	302,243	309,358
Investment in Sunrise Energy	3,334	3,181
Other assets	8,428	8,258
Total Assets	363,085	384,130
Current liabilities:
Current portion of bank debt, net	26,773	34,311
Current portion of PPP note	0	5,490
Accounts payable and accrued liabilities	39,253	31,409
Total current liabilities	66,026	71,210
Long-term liabilities:
Bank debt, net	83,523	97,307
PPP note	0	4,510
Deferred income taxes	133	2,824
Asset retirement obligations	17,212	16,177
Other	2,109	2,842
Total long-term liabilities	102,977	123,660
Total liabilities	169,003	194,870
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; 30,613 and 30,610 issued and outstanding, respectively	306	306
Additional paid-in capital	104,231	103,399
Retained earnings	85,545	81,555
Total stockholders’ equity	190,082	185,260
Total liabilities, redeemable noncontrolling interests, and stockholders’ equity	$ 363,085	$ 384,130