Nature of the Business and Basis of Presentation - Additional Information (Details) $ in Thousands			6 Months Ended
	Oct. 06, 2020 USD ($) shares	Sep. 25, 2020	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Class Of Stock [Line Items]
Net loss			$ 43,551	$ 22,705
Accumulated deficit			227,374		$ 183,823
Net proceeds from issuance of follow-on after deducting underwriting discounts, commission and estimated expenses			169,500
Cash, cash equivalents and marketable securities			$ 498,700
Reverse stock split		one-for-8.4335	one-for-8.4335
Stock split conversion ratio		0.118574732	0.118574732
Common Stock | IPO
Class Of Stock [Line Items]
Initial public offering closing date	Oct. 06, 2020
Net proceeds after deducting underwriting discounts, commissions and expenses	$ 191,200
Outstanding shares of preferred stock automatically converted | shares	30,355,379