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Note 6 - Inventories
9 Months Ended
Sep. 30, 2019
Notes to Financial Statements  
Inventory Disclosure [Text Block]
(
6
)
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):
 
    September 30,
2019
 
December 31,
2018
Raw materials   $
9,880
    $
11,727
 
Work in process    
3,162
     
2,521
 
Finished goods    
6,177
     
5,328
 
Total inventory   $
19,219
    $
19,576