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Inventories (Tables)
 6 Months Ended
Jun. 30, 2015
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current
Inventories consist of the following (in thousands):
 
June 30,
2015
 
December 31,
2014
 
 
 
 
Purchased materials
$
263

 
$
402

Work-in-process
19

 
—

Finished goods
2,644

 
2,841

 
$
2,926

 
$
3,243