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Note 11 - Inventory (Tables)
9 Months Ended
Sep. 30, 2018
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
September 30,
   
December 31,
 
   
2018
   
2017
 
   
(Unaudited)
   
 
 
 
Raw materials
  $
12,000
    $
10,011
 
Work in process
   
6,663
     
7,150
 
Finished goods
   
1,264
     
1,645
 
Reserve for excess and obsolete inventory
   
(1,071
)    
(1,165
)
Total
  $
18,856
    $
17,641