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Property and Equipment - Schedule of Property and Equipment (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Property, Plant and Equipment [Abstract]    
Computer equipment and purchased software $ 3,564 $ 3,418
Machinery and equipment 923 688
Furniture and fixtures 1,361 852
Leasehold improvements 3,838 1,295
Total 9,686 6,253
Less accumulated depreciation (5,097) (5,046)
Property and equipment, net $ 4,589 $ 1,207