Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 5,532	$ 6,951
Accounts receivable	19,256	10,729
Inventories	15,261	14,185
Prepaid expenses and other	4,274	3,154
Total current assets	44,323	35,019
Property, plant and equipment – net	178,202	149,205
Advanced coal royalties	3,271	3,045
Other	1,017	975
Total Assets	226,813	188,244
Current liabilities
Accounts payable	10,663	16,393
Accrued expenses	11,740	8,094
Asset retirement obligations	19	71
Current portion of long-term debt	3,333	5,000
Other	656	287
Total current liabilities	26,411	29,845
Asset retirement obligations	14,586	12,707
Long-term debt, net	9,614	4,474
Deferred tax liability	5,265	109
Other long-term liabilities	854
Total liabilities	56,730	47,135
Commitments and contingencies
Stockholders' Equity
Preferred stock, $0.01 par value, 50,000,000 shares authorized, none issued and outstanding
Common stock, $0.01 par value, 260,000,000 shares authorized, 40,933,831 and 40,082,467 shares issued and outstanding, respectively	410	401
Additional paid-in capital	154,957	150,926
Retained earnings (deficit)	14,716	(10,218)
Total stockholders' equity	170,083	141,109
Total Liabilities and Stockholders' Equity	$ 226,813	$ 188,244