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Property and Equipment (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Property, Plant and Equipment [Line Items]    
Total $ 26,011 $ 25,849
Less: accumulated depreciation and amortization (21,070) (19,934)
Property, Plant and Equipment, Net 4,941 5,915
Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total 13,666 13,719
Software [Member]    
Property, Plant and Equipment [Line Items]    
Total 5,042 4,863
Furniture and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total 2,351 2,348
Leasehold improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total $ 4,952 $ 4,919