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Inventories (Tables)
 12 Months Ended
Dec. 31, 2014
Inventory Disclosure [Abstract]  
Inventory
Inventories consisted of the following items as of December 31, 2014 and 2013 (in thousands):

 
December 31,
 
2014
 
2013
Raw materials
$
255

 
$
202

Work in process
3,419

 
2,952

Finished goods
1,986

 
1,049

Inventory, gross
5,660

 
4,203

Reserve for obsolescence
(527
)
 
(322
)
Inventory, net
$
5,133

 
$
3,881