Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Current assets:
Cash and cash equivalents	$ 36,778	$ 10,070
Restricted cash	6,585	5,302
Accounts receivable	9,152	13,989
Inventory	47,164	42,534
Parts and supplies	47,893	45,854
Prepaid expenses	1,604	5,638
Other current assets	1,927
Total current assets	151,103	123,387
Property, plant and equipment:
Land and mineral rights	69,952	69,952
Buildings and equipment	440,682	421,037
Mine development	102,302	102,302
Construction work in progress	35,788	39,671
Finance lease right-of-use assets	12,591	12,591
Total property, plant and equipment	661,315	645,553
Less - accumulated depreciation, depletion and amortization	(376,481)	(367,775)
Total property, plant and equipment, net	284,834	277,778
Equity method investments	2,528	2,647
Operating lease right-of-use assets	2,315
Other noncurrent assets	7,852	4,241
Total assets	448,632	408,053
Current liabilities:
Accounts payable	19,818	12,594
Accrued liabilities and other	35,078	29,254
Current portion of lease financing	4,981	7,411
Contract liabilities - current	130,170	103,343
Total current liabilities	190,047	152,602
Long-term liabilities:
Bank debt, net		29,678
Long-term lease financing	617	1,338
Deferred income taxes	1,329	1,833
Asset retirement obligations	15,649	15,241
Contract liabilities - long-term	32,148	45,714
Other	3,268	1,814
Total long-term liabilities	53,011	95,618
Total liabilities	243,058	248,220
Commitments and contingencies (Note 14)
Stockholders' equity:
Preferred stock, $.10 par value, 10,000 shares authorized; none issued
Common stock, $.01 par value, 100,000 shares authorized; 47,132 and 43,817 issued and outstanding, as of March 31, 2026 and December 31, 2025, respectively	471	438
Additional paid-in capital	257,992	202,963
Retained deficit	(52,889)	(43,568)
Total stockholders' equity	205,574	159,833
Total liabilities and stockholders' equity	$ 448,632	$ 408,053