Employee Benefit Plan - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Retirement Benefits [Abstract]
Defined contribution plan, employer's matching contribution percent	50.00%	50.00%	50.00%
Maximum percentage limit of employee contributions	8.00%	8.00%	8.00%
Defined contribution plan, maximum employer's contribution per employee	$ 4,000	$ 4,000	$ 4,000
Aggregate employer's contributions to defined contribution plan	$ 1,200,000	$ 900,000	$ 800,000