Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets
Cash and cash equivalents	$ 30,503	$ 41,962
Accounts receivable	103,539	96,866
Inventories	41,280	37,163
Prepaid expenses and other	7,286	13,748
Total current assets	182,608	189,739
Property, plant, and equipment, net	466,253	459,091
Financing lease right-of-use assets, net	17,148	10,282
Advanced coal royalties	3,410	2,964
Other	4,592	3,760
Total Assets	674,011	665,836
Current liabilities
Accounts payable	59,694	51,624
Accrued liabilities	49,657	52,225
Current portion of asset retirement obligations	110	110
Current portion of long-term debt	28,227	56,534
Current portion of financing lease obligations	8,541	5,456
Insurance financing liability	2,238	4,037
Total current liabilities	148,467	169,986
Asset retirement obligations, net	29,197	28,850
Long-term debt, net	24,739	349
Long-term financing lease obligations, net	8,543	4,915
Senior notes, net	33,412	33,296
Deferred tax liability, net	52,424	54,352
Other long-term liabilities	4,961	4,483
Total liabilities	301,743	296,231
Commitments and contingencies
Stockholders' Equity
Preferred stock, $0.01 par value, 50,000,000 shares authorized, none issued or outstanding
Additional paid-in capital	279,962	277,133
Retained earnings	91,775	91,944
Total stockholders' equity	372,268	369,605
Total Liabilities and Stockholders' Equity	674,011	665,836
Class A Common Stock
Stockholders' Equity
Common stock	443	440
Class B Common Stock
Stockholders' Equity
Common stock	$ 88	$ 88