Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 15,319	$ 5,532
Accounts receivable	14,420	19,256
Inventories	23,458	15,261
Prepaid expenses and other	4,943	4,274
Total current assets	58,140	44,323
Property, plant and equipment – net	181,896	178,202
Advanced coal royalties	3,640	3,271
Other	983	1,017
Total Assets	244,659	226,813
Current liabilities
Accounts payable	13,099	10,663
Accrued expenses	11,484	11,740
Asset retirement obligations	361	19
Current portion of long-term debt	3,333	3,333
Other	375	656
Total current liabilities	28,652	26,411
Asset retirement obligations	14,394	14,586
Long-term debt, net	22,295	9,614
Deferred tax liability	5,375	5,265
Other long-term liabilities	975	854
Total liabilities	71,691	56,730
Commitments and contingencies
Stockholders' Equity
Common stock, $0.01 par value, 260,000,000 shares authorized, 40,933,831 and 40,082,467 shares issued and outstanding, respectively	427	410
Additional paid-in capital	155,863	154,957
Retained earnings (deficit)	16,678	14,716
Total stockholders' equity	172,968	170,083
Total Liabilities and Stockholders' Equity	$ 244,659	$ 226,813