Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
ASC 842
Summary Of Significant Accounting Policies [Line Items]
Operating lease right-of-use asset	$ 300,000		$ 300,000
Operating lease liabilities	300,000		300,000
Vaccinex Products
Summary Of Significant Accounting Policies [Line Items]
Gain or loss from VIE	$ 0	$ 0	$ 0	$ 0