Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 6,360	$ 5,532
Accounts receivable	21,286	19,256
Inventories	23,288	15,261
Prepaid expenses and other	3,789	4,274
Total current assets	54,723	44,323
Property, plant and equipment – net	181,019	178,202
Advanced coal royalties	4,605	3,271
Other	965	1,017
Total Assets	241,312	226,813
Current liabilities
Accounts payable	11,803	10,663
Accrued expenses	9,325	11,740
Asset retirement obligations	1,044	19
Current portion of long-term debt	4,914	3,333
Other		656
Total current liabilities	27,086	26,411
Asset retirement obligations	14,147	14,586
Long-term debt, net	21,022	9,614
Deferred tax liability	5,228	5,265
Other long-term liabilities	982	854
Total liabilities	68,465	56,730
Commitments and contingencies
Stockholders' Equity
Common stock, $0.01 par value, 260,000,000 shares authorized, 42,621,869 and 40,933,831 shares issued and outstanding, respectively	427	410
Additional paid-in capital	157,866	154,957
Retained earnings	14,554	14,716
Total stockholders' equity	172,847	170,083
Total Liabilities and Stockholders' Equity	$ 241,312	$ 226,813