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Other Current Liabilities
 9 Months Ended
Sep. 30, 2014
Text Block [Abstract]  
Other Current Liabilities
Other Current Liabilities
Other current liabilities consist of the following (in thousands):
 
September 30, 2014
 
December 31, 2013
Customer incentives
$
3,762

 
$
3,068

Accrued research and development costs
1,981

 
240

Other
2,701

 
2,303

Total other current liabilities
$
8,444

 
$
5,611