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Business Combination - Summary of Components of Identifiable Intangible Assets Acquired and their Estimated Useful Lives (Detail)
$ in Thousands
9 Months Ended
Sep. 30, 2020
USD ($)
Portion At Fair Value Disclosure [Member]  
Identifiable Intangible Assets Acquired [Line items]  
Fair Value $ 4,000
Developed technology [Member]  
Identifiable Intangible Assets Acquired [Line items]  
Useful Life 6 years
Developed technology [Member] | Portion At Fair Value Disclosure [Member]  
Identifiable Intangible Assets Acquired [Line items]  
Fair Value $ 2,800
Customer relationships [Member]  
Identifiable Intangible Assets Acquired [Line items]  
Useful Life 6 years
Customer relationships [Member] | Portion At Fair Value Disclosure [Member]  
Identifiable Intangible Assets Acquired [Line items]  
Fair Value $ 1,200