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Description of Business and Basis of Presentation (Detail) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended	9 Months Ended
	Sep. 17, 2024	Feb. 27, 2024	Sep. 30, 2024	Sep. 30, 2024	Mar. 05, 2024	Feb. 28, 2024	Feb. 28, 2024	Feb. 28, 2024	Dec. 31, 2023	Nov. 20, 2023
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Cash and cash equivalents			$ 41,571	$ 41,571					$ 9,446
Retained earnings (accumulated deficit)			(296,084)	(296,084)					$ (281,042)
Entity public float, threshold							$ 75,000
Percent of public float						33.30%		3.00%
Parent Company
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Cash and cash equivalents			$ 28,900	$ 28,900
Private Placement
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Proceeds from issuance of private placement		$ 51,000
Private placement, shares (in shares)					116,493
Private placement pre-funded warrants, shares (in shares)					116,590
Private Placement | Private Placement Pre-Funded Warrants
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Exercise price of warrants or rights (in usd per share)		$ 0.01
Class A Common Stock
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Common stock par value (in usd per share)			$ 0.01	$ 0.01					$ 0.01	$ 0.01
Shares sold (in shares)	179,400
Sale of stock, consideration received on transaction	$ 2,500
Class A Common Stock | Private Placement
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Shares sold (in shares)		464,377
Sale of stock, price per share (in usd per share)		$ 11.81
Class A Common Stock | Private Placement | Private Placement Pre-Funded Warrants
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Sale of stock, price per share (in usd per share)		$ 11.80
Number of securities called by warrants or rights (in shares)		3,853,997	3,970,587	3,970,587
Class A Common Stock | TD Cowen Sales Agreement
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Shares sold (in shares)			179,400	179,400
Aggregate offering price							$ 50,000
Sale of stock, consideration received on transaction			$ 2,500	$ 2,500
Class B Common Stock
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Common stock par value (in usd per share)			$ 0.01	$ 0.01					$ 0.01	$ 0.01
vTv Therapeutics LLC
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Percentage of non-voting economic interest of vTv Therapeutics Holdings LLC in vTv LLC				18.10%
Percentage of non-voting economic interest of vTv Therapeutics Inc in vTv LLC				81.90%
vTv Therapeutics LLC | Class B Common Stock
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Common stock par value (in usd per share)			$ 0.01	$ 0.01

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