Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 23,668	$ 26,868
Accounts receivable:
Trade	59,549	31,515
Other, net	20,520	17,538
Inventories:
Product inventories	45,200	34,962
Materials and supplies	72,177	69,974
Other current assets	25,199	33,295
Total current assets	246,313	214,152
Investments	37,518	33,897
Non-current restricted cash and cash equivalents	1,177	1,177
Property, plant and mine development, net	2,700,896	2,694,119
Operating lease right-of-use assets	9,387	7,544
Other non-current assets	28,266	30,171
Total assets	3,023,557	2,981,060
Current liabilities:
Accounts payable and accrued liabilities	77,263	88,957
Accrued payroll and related benefits	18,954	22,834
Accrued taxes	9,081	6,312
Less: current debt	33,612	33,617
Finance leases	7,904	8,169
Accrued reclamation and closure costs	11,113	13,748
Accrued interest	5,161	14,316
Other current liabilities	9,635	9,885
Total current liabilities	172,723	197,838
Accrued reclamation and closure costs	115,024	111,162
Long-term debt including finance leases	527,137	508,927
Deferred tax liabilities	124,382	110,266
Other non-current liabilities	10,324	13,353
Total liabilities	949,590	941,546
Commitments and contingencies (Notes 4, 7, 8, and 11)
STOCKHOLDERS' EQUITY
Series B preferred stock, $0.25 par value, 157,756 shares issued and outstanding, liquidation preference - $7,889	39	39
Common stock, $0.25 par value, authorized 750,000,000 shares; issued March 31, 2025 - 641,254,525 shares and December 31, 2024 - 640,547,918 shares	160,228	160,052
Capital surplus	2,423,631	2,418,149
Accumulated deficit	(467,168)	(493,529)
Accumulated other comprehensive loss, net	(7,832)	(10,266)
Less treasury stock, at cost; March 31, 2025 - 8,813,127 and December 31, 2024 - 8,813,127 shares issued and held in treasury	(34,931)	(34,931)
Total stockholders' equity	2,073,967	2,039,514		$ 1,968,104
Total liabilities and stockholders' equity	$ 3,023,557	$ 2,981,060