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Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Mar. 31, 2018
Dec. 31, 2017
Finite and Indefinite Lived Intangible Assets [Line Items]        
Intangible assets, Trade name $ 2,371 $ 2,497    
Intangible assets, gross 12,495 13,053    
Accumulated amortization (3,968) (3,828)    
Intangible assets, net 8,527 9,225 $ 10,742 $ 11,021
Customer Relationships [Member]        
Finite and Indefinite Lived Intangible Assets [Line Items]        
Intangible assets, gross 6,019 6,234    
Developed Technology [Member]        
Finite and Indefinite Lived Intangible Assets [Line Items]        
Intangible assets, gross $ 4,105 $ 4,322