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Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)
9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Goodwill And Intangible Assets [Line Items]      
Remaining amortization period 4 years 10 months 24 days    
Amortization of intangible assets $ 300,000 $ 100,000  
Write off of intangible assets 0    
Intangible assets other than goodwill with indefinite lives $ 0   $ 0
Minimum [Member]      
Goodwill And Intangible Assets [Line Items]      
Estimated useful lives 3 years    
Maximum [Member]      
Goodwill And Intangible Assets [Line Items]      
Estimated useful lives 17 years