Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 2,582	$ 8,041
Restricted cash	3,495	4,030
Accounts receivable	14,386	14,414
Inventory	32,345	24,663
Parts and supplies	9,295	8,903
Prepaid expenses	1,035	3,282
Total current assets	63,138	63,333
Property, plant and equipment, at cost:
Land and mineral rights	115,946	115,853
Buildings and equipment	357,754	352,115
Mine development	100,910	93,635
Total property, plant and equipment, at cost	574,610	561,603
Less - accumulated depreciation, depletion and amortization	(271,487)	(252,245)
Total property, plant and equipment, net	303,123	309,358
Investment in Sunrise Energy	3,244	3,181
Other assets	8,325	8,258
Total Assets	377,830	384,130
Current liabilities:
Current portion of bank debt, net	30,448	34,311
Current portion of PPP note	10,000	5,490
Accounts payable and accrued liabilities	36,794	31,409
Total current liabilities	77,242	71,210
Long-term liabilities:
Bank debt, net	94,378	97,307
PPP note	0	4,510
Deferred income taxes	1,492	2,824
Asset retirement obligations	16,879	16,177
Other	2,010	2,842
Total long-term liabilities	114,759	123,660
Total liabilities	192,001	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	103,964	103,399
Retained earnings	77,559	81,555
Total stockholders’ equity	181,829	185,260
Total liabilities, redeemable noncontrolling interests, and stockholders’ equity	$ 377,830	$ 384,130