Redeemable Noncontrolling Interest - Additional Information (Detail) $ in Millions |
9 Months Ended | |
---|---|---|
Sep. 30, 2021
USD ($)
|
Dec. 31, 2020
USD ($)
|
|
Noncontrolling Interest [Line Items] | ||
Redemption amount of noncontrolling interest | $ 44.6 | $ 83.9 |
Class A Common Stock [Member] | ||
Noncontrolling Interest [Line Items] | ||
Number of days used to determine exchange value based on weighted average price of Class A common stock | 20 days | |
Class A Common Stock [Member] | Exchange of Redeemable Non controlling Interest To Class A Common Stock [Member] | ||
Noncontrolling Interest [Line Items] | ||
Stock conversion ratio | 1.00 | |
vTv Therapeutics LLC [Member] | ||
Noncontrolling Interest [Line Items] | ||
Noncontrolling interest ownership percentage | 25.80% |