Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 7,375	$ 8,799
Restricted cash (Note 12)	4,508	4,512
Certificates of deposit	0	245
Accounts receivable	13,494	25,580
Prepaid income taxes	975	1,562
Inventory (Note 3)	42,012	28,297
Parts and supplies, net of allowance of $274	9,568	11,775
Prepaid expenses	2,682	1,678
Total current assets	80,614	82,448
Property, plant and equipment, at cost:
Land and mineral rights	114,974	114,722
Buildings and equipment	357,912	351,614
Mine development	87,542	84,160
Total property, plant and equipment, at cost	560,428	550,496
Less - accumulated DD&A	(240,964)	(220,780)
Total property, plant and equipment, net	319,464	329,716
Investment in Sunrise Energy (Note 15)	3,412	3,139
Other long-term assets (Note 4)	8,169	10,324
Total Assets	411,659	425,627
Current liabilities:
Current portion of bank debt, net (Note 5)	34,311	33,044
Current portion of PPP note (Note 5)	4,448	0
Accounts payable and accrued liabilities (Note 6)	32,801	31,800
Total current liabilities	71,560	64,844
Long-term liabilities:
Bank debt, net (Note 5)	119,463	140,594
PPP note (Note 5)	5,552	0
Deferred income taxes	2,614	4,884
Asset retirement obligations (ARO)	16,262	15,694
Other	4,701	4,081
Total long-term liabilities	148,592	165,253
Total liabilities	220,152	230,097
Redeemable noncontrolling interests (Note 2)	4,000	4,000
Stockholders' equity:
Preferred stock, $.10 par value, 10,000 shares authorized; none issued	0	0
Common stock, $.01 par value, 100,000 shares authorized; 30,465 and 30,420 outstanding, respectively	305	304
Additional paid-in capital	102,833	102,215
Retained earnings	84,369	89,011
Total stockholders’ equity	187,507	191,530
Total liabilities, redeemable noncontrolling interests, and stockholders’ equity	$ 411,659	$ 425,627