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Note 3 - Inventories
6 Months Ended
Jun. 30, 2020
Notes to Financial Statements  
Inventory Disclosure [Text Block]

3.

Inventories

 

Inventories consist of the following (in thousands):

 

  

June 30, 2020

  

December 31, 2019

 
         

Raw materials

 $26,252  $26,772 

Work-in-process

  2,058   1,579 

Finished goods

  5,527   683 

Supplies

  1,588   1,620 

Total inventories

 $35,425  $30,654