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Note 10 - Inventory (Tables)
6 Months Ended
Jun. 30, 2019
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
June 30,
   
December 31,
 
   
2019
   
2018
 
   
(Unaudited)
   
 
 
 
Raw materials
  $
15,242
    $
12,354
 
Work in process
   
4,871
     
6,331
 
Finished goods
   
1,439
     
1,313
 
Reserve for excess and obsolete inventory
   
(1,633
)    
(1,414
)
Total
  $
19,919
    $
18,584