Equity Incentive Plans - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Jan. 01, 2021	Dec. 31, 2020
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 5,852,000	$ 580,000
Stock Option
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock options outstanding				1,933,000
Stock options, description	The options vest over the requisite service period if the Company achieves both (i) a performance condition tied to a liquidity event, which includes the effectiveness of an IPO, and (ii) certain market conditions, provided the optionee is providing services on the date of the event.
Stock options, nonvested, number of shares	151,000
Award vesting period, month and year	2021-09
Stock-based compensation expense	$ 4,200,000	$ 0
Unamortized stock-based compensation expense amount	$ 500,000
Estimated weighted average period over which unamortized share-based compensation are expected to be recognize	3 months 18 days
2020 Equity Incentive Plan
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Common stock shares reserved for issuance	4,460,000		1,709,000
Employees Share Purchase Plan (ESPP)
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Common stock shares reserved for issuance	1,034,000		427,000
Percentage of fair market value of common stock	85.00%
Number of common stock issued	80,000	0