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Note 6 - Inventories
9 Months Ended
Sep. 30, 2018
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,
2018
  December 31,
2017
Raw materials   $
10,226
    $
6,898
 
Work in process    
4,105
     
1,207
 
Finished goods    
5,571
     
4,758
 
Total inventory   $
19,902
    $
12,863