Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 5,302	$ 8,799
Restricted cash (Note 12)	4,243	4,512
Certificates of deposit	0	245
Accounts receivable	15,846	25,580
Prepaid income taxes	0	1,562
Inventory (Note 3)	36,803	28,297
Parts and supplies, net of allowance of $274	9,172	11,775
Prepaid expenses	4,771	1,678
Total current assets	76,137	82,448
Property, plant and equipment, at cost:
Land and mineral rights	115,894	114,722
Buildings and equipment	357,498	351,614
Mine development	89,229	84,160
Total property, plant and equipment, at cost	562,621	550,496
Less - accumulated depreciation, depletion and amortization	(250,134)	(220,780)
Total property, plant and equipment, net	312,487	329,716
Investment in Sunrise Energy (Note 15)	3,293	3,139
Other long-term assets (Note 4)	8,290	10,324
Total Assets	400,207	425,627
Current liabilities:
Current portion of bank debt, net (Note 5)	34,311	33,044
Current portion of PPP note (Note 5)	2,160	0
Accounts payable and accrued liabilities (Note 6)	33,526	31,800
Total current liabilities	69,997	64,844
Long-term liabilities:
Bank debt, net (Note 5)	105,885	140,594
PPP note (Note 5)	7,840	0
Deferred income taxes	2,228	4,884
Asset retirement obligations	16,476	15,694
Other	4,061	4,081
Total long-term liabilities	136,490	165,253
Total liabilities	206,487	230,097
Redeemable noncontrolling interests (Note 2)	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; 30,466 and 30,420 issued and outstanding, respectively	305	304
Additional paid-in capital	103,123	102,215
Retained earnings	86,292	89,011
Total stockholders’ equity	189,720	191,530
Total liabilities, redeemable noncontrolling interests, and stockholders’ equity	$ 400,207	$ 425,627