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Note 5 - Inventories
9 Months Ended
Sep. 30, 2017
Notes to Financial Statements  
Inventory Disclosure [Text Block]
(
5
)
Inventories
 
Inventories are stated at the lower of cost (
first
-in,
first
-out) or net realizable value, and consist of the following at the stated dates (in thousands):
 
    September 30,
2017
 
December 31,
2016
Raw materials   $
6,660
    $
7,111
 
Work in process    
1,161
     
1,354
 
Finished goods    
5,315
     
5,686
 
Total inventory   $
13,136
    $
14,151