Net Loss per Share - Reconciliation of the Numerator and Denominator Used in the Calculation of Basic and Diluted Net Loss per Share of Class A Common Stock (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Numerator:
Net loss	$ (5,942)	$ (7,165)
Less: Net loss attributable to noncontrolling interests	(1,701)	(2,441)
Net loss attributable to common shareholders of vTv Therapeutics Inc., basic and diluted	$ (4,241)	$ (4,724)
Class A Common Stock [Member]
Denominator:
Weighted-average vTv Therapeutics Inc. Class A Common Stock, basic and diluted	56,472,535	43,462,551
Net loss per share of vTv Therapeutics Inc. Class A Common Stock, basic and diluted	$ (0.08)	$ (0.11)