Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' Deficit - 6 months ended Jun. 30, 2018 - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Deficit	Total Vaccinex,Inc. Stockholder Deficit	Noncontrolling Interests	Redeemable Convertible Preferred Stock	Redeemable Convertible Preferred Stock Treasury Stock	Convertible Preferred Stock Common Stock
Balance at Dec. 31, 2017	$ 111,718							$ 111,718
Balance, Shares at Dec. 31, 2017	53,089,959							53,089,959
Balance (unaudited) at Jun. 30, 2018	$ 111,718							$ 111,718
Balance (unaudited), Shares at Jun. 30, 2018	53,089,959							53,089,959
Balance at Dec. 31, 2017	$ (113,490)		$ 54,123	$ (11)	$ (187,249)	$ (125,453)	$ 11,963			$ 7,684
Balance, Shares at Dec. 31, 2017		1,103,396		836					163	5,702,450
Capital contribution (unaudited)	12,000						12,000
Stock-based compensation (unaudited)	88		88			88
Exercise of stock options	$ 5		5			5
Exercise of stock options, Shares	700	700
Net loss (unaudited)	$ (14,470)				(14,470)	(14,470)
Balance (unaudited) at Jun. 30, 2018	$ (115,867)		$ 54,216	$ (11)	$ (201,719)	$ (139,830)	$ 23,963			$ 7,684
Balance (unaudited), Shares at Jun. 30, 2018		1,104,096		836					163	5,702,450