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Inventories (Tables)
3 Months Ended
Mar. 31, 2017
Inventory Disclosure [Abstract]  
Schedule of Inventories
Inventories consists of the following (in thousands):
 
March 31, 2017
 
December 31, 2016
Raw materials
$
3,116

 
$
3,291

Work in process
1,148

 
790

Finished goods
2,156

 
3,044

Total inventories
$
6,420

 
$
7,125