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Contingencies - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Sep. 30, 2019
Commitments And Contingencies Disclosure [Abstract]      
Accrued other long-term liabilities $ 5.2    
Estimated sales and marketing expense 0.4 $ 0.3  
Freezing amount in cash resulted from court pending legal action issued     $ 0.5
Accruals related court pending legal dispute $ 1.3