Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 12,483	$ 9,788
Restricted cash (Note 8)	3,811	2,817
Certificates of deposit	1,495	7,315
Marketable securities	1,907	1,763
Accounts receivable	16,762	22,307
Prepaid income taxes	2,899
Coal inventory	12,804	10,100
Parts and supply inventory	10,043	10,091
Purchased coal contracts		8,922
Prepaid expenses	9,433	9,647
Total current assets	71,637	82,750
Coal properties, at cost:
Land and mineral rights	129,724	126,303
Buildings and equipment	356,911	339,999
Mine development	136,762	126,037
Total coal properities, at cost	623,397	592,339
Less - accumulated DD&A	(203,391)	(169,579)
Total coal properties, net	420,006	422,760
Other assets (Note 7)	14,660	14,114
Total assets	518,193	531,323
Current liabilities:
Current portion of bank debt, net (Note 3)	33,171	28,796
Accounts payable and accrued liabilities (Note 14)	21,115	19,918
Total current liabilities	54,286	48,714
Long-term liabilities:
Bank debt, net (Note 3)	165,773	204,944
Deferred income taxes	28,728	45,174
Asset retirement obligations	13,506	13,115
Other	6,577	2,486
Total long-term liabilities	214,584	265,719
Total liabilities	268,870	314,433
Stockholders' equity:
Preferred stock, $.10 par value, 10,000 shares authorized; none issued
Common stock, $.01 par value, 100,000 shares authorized; 29,955 and 29,413 shares outstanding, respectively	299	294
Additional paid-in capital	97,873	93,816
Retained earnings	150,236	122,052
Accumulated other comprehensive income	915	728
Total stockholders' equity	249,323	216,890
Total liabilities and stockholders' equity	518,193	531,323
Savoy [Member]
Coal properties, at cost:
Investment in subsidiaries	8,037	7,577
Sunrise Energy [Member]
Coal properties, at cost:
Investment in subsidiaries	$ 3,853	$ 4,122