Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 10,079	$ 9,788
Restricted cash (Note 5)	3,320	2,817
Certificates of deposit	3,436	7,315
Marketable securities	1,852	1,763
Accounts receivable	17,105	22,307
Coal inventory	22,788	10,100
Parts and supply inventory	10,441	10,091
Purchased coal contracts	4,480	8,922
Prepaid expenses	11,170	9,647
Total current assets	84,671	82,750
Coal properties, at cost:
Land and mineral rights	126,682	126,303
Buildings and equipment	346,052	339,999
Mine development	131,944	126,037
Total coal properities, at cost	604,678	592,339
Less - accumulated DD&A	(187,159)	(169,579)
Total coal properties, net	417,519	422,760
Other assets (Note 4)	13,772	14,114
Total assets	527,919	531,323
Current liabilities:
Current portion of bank debt, net	33,171	28,796
Accounts payable and accrued liabilities	19,904	19,773
Total current liabilities	53,075	48,569
Long-term liabilities:
Bank debt, net	188,359	204,944
Deferred income taxes	44,783	45,174
Asset retirement obligations (ARO)	13,480	13,260
Other	2,808	2,486
Total long-term liabilities	249,430	265,864
Total liabilities	302,505	314,433
Stockholders' equity:
Preferred stock, $.10 par value, 10,000 shares authorized; none issued
Common stock, $.01 par value, 100,000 shares authorized; 29,763 and 29,413 shares	297	294
Additional paid-in capital	96,915	93,816
Retained earnings	127,446	122,052
Accumulated other comprehensive income	756	728
Total stockholders' equity	225,414	216,890
Total liabilities and stockholders' equity	527,919	531,323
Savoy [Member]
Coal properties, at cost:
Investment in subsidiaries (Note 3)	7,833	7,577
Sunrise Energy [Member]
Coal properties, at cost:
Investment in subsidiaries (Note 3)	$ 4,124	$ 4,122