Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 7,232	$ 2,842
Restricted cash	4,921	4,281
Accounts receivable	15,438	19,937
Inventory	36,685	23,075
Parts and supplies	39,104	38,877
Prepaid expenses	1,478	2,262
Assets held-for-sale		1,540
Total current assets	104,858	92,814
Property, plant and equipment:
Land and mineral rights	70,307	115,486
Buildings and equipment	429,857	537,131
Mine development	92,458	158,642
Finance lease right-of-use assets	13,034	12,346
Total property, plant and equipment	605,656	823,605
Less - accumulated depreciation, depletion and amortization	(347,952)	(334,971)
Total property, plant and equipment, net	257,704	488,634
Equity method investments	2,607	2,811
Other assets	3,951	5,521
Total assets	369,120	589,780
Current liabilities:
Current portion of bank debt, net	4,095	24,438
Accounts payable and accrued liabilities	44,298	62,908
Current portion of lease financing	6,912	3,933
Contract liabilities - current	97,598	66,316
Total current liabilities	152,903	157,595
Long-term liabilities:
Bank debt, net	37,394	63,453
Convertible notes payable		10,000
Convertible notes payable - related party		9,000
Long-term lease financing	8,749	8,157
Deferred income taxes		9,235
Asset retirement obligations	14,957	14,538
Contract liabilities - long-term	49,121	47,425
Other	1,711	1,789
Total long-term liabilities	111,932	163,597
Total liabilities	264,835	321,192
Commitments and contingencies (Note 22)
Stockholders' equity:
Preferred stock, $.10 par value, 10,000 shares authorized; none issued
Common stock, $.01 par value, 100,000 shares authorized; 42,621 and 34,052 issued and outstanding, as of December 31, 2024 and December 31, 2023, respectively	426	341
Additional paid-in capital	189,298	127,548
Retained earnings (deficit)	(85,439)	140,699
Total stockholders' equity	104,285	268,588
Total liabilities and stockholders' equity	$ 369,120	$ 589,780