Subsequent Events - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		9 Months Ended
	Nov. 09, 2020	Sep. 30, 2020	Sep. 30, 2019
Subsequent Event [Line Items]
Net proceed from issuance of common stock			$ 134,524
Pfizer Inc. Private Placement
Subsequent Event [Line Items]
Net proceed from issuance of common stock		$ 60,000
Pfizer Inc. Private Placement | Subsequent Event
Subsequent Event [Line Items]
Shares issued and sold	5,000,000
Shares issued price per share	$ 12.00
Net proceed from issuance of common stock	$ 60,000