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Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($)
$ in Thousands
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Jun. 30, 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 12,505   13,053      
Accumulated amortization (4,264)   (3,828)      
Intangible assets, net 8,241 $ 8,527 9,225 $ 10,075 $ 10,742 $ 11,021
Customer Relationships [Member]            
Finite and Indefinite Lived Intangible Assets [Line Items]            
Intangible assets, gross 6,029   6,234      
Developed Technology [Member]            
Finite and Indefinite Lived Intangible Assets [Line Items]            
Intangible assets, gross $ 4,105   $ 4,322