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Equity-Based Compensation - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Aug. 20, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation expense	$ 9,622,000	$ 5,726,000	$ 17,495,000	$ 8,898,000
Research and Development Expense
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation expense	4,765,000	2,917,000	8,670,000	4,642,000
General and Administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation expense	4,857,000	2,809,000	8,825,000	4,256,000
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Intrinsic value of stock options exercised	$ 2,400	$ 17,100,000	$ 8,700,000	$ 37,100,000
Weighted-average fair value of options granted	$ 13.48	$ 26.99	$ 21.08	$ 28.66
Unrecognized stock-based compensation expense	$ 75,200,000		$ 75,200,000
Unrecognized compensation cost, recognition period			2 years 6 months
Equity-based compensation expense	9,072,000	$ 5,613,000	$ 16,673,000	$ 8,684,000
Stock Options \| Research and Development Expense
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation expense	4,346,000	2,821,000	8,035,000	4,458,000
Stock Options \| General and Administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation expense	$ 4,726,000	$ 2,792,000	$ 8,638,000	4,226,000
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost, recognition period			2 years 10 months 24 days
Granted	178,925		276,902
Unrecognized stock-based compensation expense	$ 6,000,000.0		$ 6,000,000.0
Equity-based compensation expense	400,000		500,000	100,000
Restricted Stock \| Research and Development Expense
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation expense	300,000		400,000	100,000
Restricted Stock \| General and Administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation expense	$ 100,000		$ 100,000	$ 100,000
2020 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares authorized for issuance under plan					4,457,370
Maximum number of shares to be issued, percentage			4.00%
Shares remaining available for future grants	3,702,479		3,702,479
2020 ESPP
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares remaining available for future grants	1,282,669		1,282,669
Share-based compensation, description			The 2020 ESPP initially reserves and authorizes the issuance of up to a total of 445,653 shares of common stock to participating employees. The 2020 ESPP provides that the number of shares reserved and available for issuance will automatically increase on January 1, 2021 and each January 1 thereafter through January 1, 2030, by the lesser of (i) 438,898 shares of common stock, (ii) 1% of the Company’s outstanding number of shares of common stock on the immediately preceding December 31 or (iii) such lesser number of shares of common stock as determined by the administrator of the 2020 ESPP
2018 Plan \| Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted		0	276,902	0