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Note 7 - Inventories
3 Months Ended
Mar. 31, 2020
Notes to Financial Statements  
Inventory Disclosure [Text Block]
(
7
)
Inventories
 
Inventories are stated at the lower of cost (determined using the
first
-in,
first
-out method) or net realizable value, and consist of the following at the stated dates (in thousands):
 
    March 31,
2020
  December 31,
2019
Raw materials   $
11,471
    $
10,540
 
Work in process    
2,795
     
2,279
 
Finished goods    
5,976
     
5,457
 
Total inventory   $
20,242
    $
18,276