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Note 8 - Inventories (Tables)
9 Months Ended
Sep. 30, 2016
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
 
 
 
 
September 30,
2016
 
 
December 31,
2015
Raw materials   $ 5,840     $ 5,780  
Work-in-process     5,844       5,656  
Finished goods     6,336       3,502  
Total   $ 18,020     $ 14,938