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Inventories
 12 Months Ended
Dec. 31, 2016
Inventory Disclosure [Abstract]  
Inventories
Inventories
 
Inventories as of December 31, 2016 and 2015 consisted of:
 
 
 
2016
 
2015
 
 
(in thousands)
Raw materials
 
$
6,546

 
$
4,833

Work in progress
 
—

 
128

Finished goods
 
6,162

 
4,024

 
 
$
12,708

 
$
8,985