Common Stock Reserved For Issuance - Additional Information (Details) - $ / shares	3 Months Ended
Jun. 30, 2019	Dec. 31, 2018
Class Of Stock [Line Items]
Common stock, par value	$ 0.0001	$ 0.0001
Common Stock
Class Of Stock [Line Items]
Conversion of units to common shares	4,455
Vaccinex Products, LP Units \| Common Stock
Class Of Stock [Line Items]
Conversion of units to common shares	4,455

The number of shares issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration