Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 21,891	$ 5,300
Accounts receivable	44,453	20,299
Inventories	15,791	11,947
Prepaid expenses and other	4,626	4,953
Total current assets	86,761	42,499
Property, plant and equipment, net	227,077	180,531
Financing lease right-of-use assets, net	9,128
Advanced coal royalties	5,576	4,784
Other	491	809
Total Assets	329,033	228,623
Current liabilities
Accounts payable	15,346	11,742
Accrued expenses	19,410	11,591
Asset retirement obligations	489	46
Current portion of long-term debt	7,674	4,872
Current portion of financing lease obligations	3,461
Other current liabilities	280	862
Total current liabilities	46,660	29,113
Asset retirement obligations	22,060	15,110
Long-term debt, net	3,339	12,578
Long-term financing lease obligations, net	4,599
Senior notes, net	32,363
Deferred tax liability, net	6,406	1,762
Other long-term liabilities	2,532	965
Total liabilities	117,959	59,528
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, 44,092,981 at December 31, 2021 and 42,706,908 at December 31, 2020 shares issued and outstanding	441	427
Additional paid-in capital	163,566	158,859
Retained earnings	47,067	9,809
Total stockholders' equity	211,074	169,095
Total Liabilities and Stockholders' Equity	$ 329,033	$ 228,623