v3.26.3
INVENTORIES (Tables)
 9 Months Ended
Sep. 30, 2026
Inventory Disclosure [Abstract]  
Schedule of Inventories
The Company’s inventories consisted of the following:
September 30, 2026December 31, 2025
(in thousands)
Raw materials and supplies, including spare parts
$78,075 $56,491 
Mined ore stockpiles
20,381 23,795 
Work in process
49,351 51,652 
Finished goods
28,332 39,622 
Total current inventories
176,139 171,560 
Add: Non-current portion(1)
117,032 80,539 
Total inventories
$293,171 $252,099 
(1)Primarily represents stockpiles of mined ore and bastnaesite concentrate that are not expected to be processed or consumed within the next 12 months. The ore and concentrate amounts were $32.2 million and $51.6 million as of September 30, 2026, respectively, and $24.1 million and $31.7 million as of December 31, 2025, respectively.
Schedule of Noncurrent Inventories
The Company’s inventories consisted of the following:
September 30, 2026December 31, 2025
(in thousands)
Raw materials and supplies, including spare parts
$78,075 $56,491 
Mined ore stockpiles
20,381 23,795 
Work in process
49,351 51,652 
Finished goods
28,332 39,622 
Total current inventories
176,139 171,560 
Add: Non-current portion(1)
117,032 80,539 
Total inventories
$293,171 $252,099 
(1)Primarily represents stockpiles of mined ore and bastnaesite concentrate that are not expected to be processed or consumed within the next 12 months. The ore and concentrate amounts were $32.2 million and $51.6 million as of September 30, 2026, respectively, and $24.1 million and $31.7 million as of December 31, 2025, respectively.