Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets, Net - Schedule of Future Amortization Related to Intangible Assets (Detail)

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Intangible Assets, Net - Schedule of Future Amortization Related to Intangible Assets (Detail) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
2018 (remainder of) $ 1,260  
2019 1,390  
2020 1,299  
2021 1,196  
2022 1,142  
Thereafter 4,866  
Net book value $ 11,153 $ 11,578