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Note 4 - Inventory (Tables)
3 Months Ended
Mar. 31, 2020
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
(In thousands)
 
March 31, 20
20
   
December 31, 201
9
 
Raw materials
  $
3,282
    $
2,979
 
Work in progress
   
1,658
     
1,896
 
Finished goods
   
5,889
     
6,097
 
Total
  $
10,829
    $
10,972