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Description of Business, Basis of Presentation and Going Concern (Detail) - USD ($) $ in Thousands			1 Months Ended	12 Months Ended
	Jan. 30, 2026	Sep. 17, 2024	May 31, 2018	Dec. 31, 2025	Dec. 31, 2024	Feb. 28, 2024
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Cash and cash equivalents				$ 88,932	$ 36,746
Accumulated deficit				$ (326,692)	$ (299,718)
Percent of public float						33.30%
TD Cowen Sales Agreement
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Entity public float, threshold						$ 75,000
Percent of public float						3.00%
Class A Common Stock
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Shares sold (in shares)		179,400
Aggregate gross purchase price		$ 2,500
Class A Common Stock \| TD Cowen Sales Agreement
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Aggregate offering price						$ 50,000
Shares sold (in shares)					179,400
Aggregate gross purchase price					$ 2,500
vTv Therapeutics LLC
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Percentage of non-voting economic interest of vTv Therapeutics Inc in vTv LLC				100.00%
Newsoara Biopharma Co., Ltd. \| Collaborative Arrangements
Organization Consolidation And Presentation Of Financial Statements [Line Items]
License fee received			$ 2,000
Newsoara Biopharma Co., Ltd. \| Subsequent Event \| Collaborative Arrangements
Organization Consolidation And Presentation Of Financial Statements [Line Items]
License fee received	$ 20,000
Parent Company
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Cash and cash equivalents				$ 68,400