Employee Benefit Plan - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Compensation Related Costs [Abstract]
Pay contributed by employer	50.00%
Pay contributed by employee	6.00%
Contribution to 401 (K) Plan	$ 3.1	$ 2.5	$ 2.6