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Goodwill and Intangible Assets, Net - Summary of Changes in Carrying Amount of Goodwill (Detail)
$ in Thousands
3 Months Ended
Mar. 31, 2019
USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]  
Balance as of December 31, 2018 $ 5,509
Performance Bridge working capital adjustment 34
Balance as of March 31, 2019 $ 5,543