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Property and Equipment (Tables)
 12 Months Ended
Dec. 31, 2014
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Property and equipment consisted of the following (in thousands):
 
 
December 31,
2014
 
December 31,
2013
Manufacturing equipment
 
$
24,643

 
$
26,779

Office equipment and software
 
30,702

 
30,745

Leasehold improvements
 
5,163

 
5,973

Property and equipment, gross
 
60,508

 
63,497

Less: accumulated depreciation and amortization
 
(50,722
)
 
(48,643
)
Property and equipment, net
 
$
9,786

 
$
14,854