Contingencies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Commitments And Contingencies Disclosure [Abstract]
Accrued other long-term liabilities	$ 7.1
Estimated sales and marketing expense	0.4	$ 0.4
Freezing amount in cash resulted from court pending legal action issued	0.5
Accruals related court pending legal dispute	$ 1.5