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Note 2 - Inventories
3 Months Ended
Mar. 31, 2023
Notes to Financial Statements  
Inventory Disclosure [Text Block]

2.

Inventories

 

Inventories consist of the following (in thousands):

 

   

March 31, 2023

   

December 31, 2022

 
                 

Raw materials

  $ 45,139     $ 47,978  

Work-in-process

    7,520       5,114  

Finished goods

    16,134       15,773  

Supplies

    2,177       2,164  

Total inventories

  $ 70,970     $ 71,029