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Goodwill and Intangible Assets - Schedule of Identifiable Intangible Assets (Detail) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2016
Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, Gross Carrying Amount $ 12,790 $ 15,110
Intangible assets, Accumulated Amortization (3,340) (3,725)
Intangible assets, Net Book Value $ 9,450 11,385
Trade Names [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, Weighted- Average Life 6 years 1 month 6 days  
Intangible assets, Gross Carrying Amount $ 519 719
Intangible assets, Accumulated Amortization (481) (389)
Intangible assets, Net Book Value $ 38 330
Developed Technology [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, Weighted- Average Life 6 years 3 months 18 days  
Intangible assets, Gross Carrying Amount $ 11,231 12,851
Intangible assets, Accumulated Amortization (2,672) (2,955)
Intangible assets, Net Book Value $ 8,559 9,896
Customer Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, Weighted- Average Life 6 years 8 months 12 days  
Intangible assets, Gross Carrying Amount $ 1,000 1,000
Intangible assets, Accumulated Amortization (159) (43)
Intangible assets, Net Book Value $ 841 957
Non-compete Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, Weighted- Average Life 2 years  
Intangible assets, Gross Carrying Amount $ 40 540
Intangible assets, Accumulated Amortization (28) (338)
Intangible assets, Net Book Value $ 12 $ 202