​

  ​ ​ ​

December 31, 

​

December 31, 

​

​

2024

  ​ ​ ​

2025

​

​

(in thousands)

Finished goods

​

$

40,445

​

36,380

Work in process

​

77,244

​

88,192

Raw materials

​

40,767

​

27,976

Supplies

​

290

​

127

​

​

$

158,746

​

152,675