v3.26.1
Significant Accounting Policies - Summary of Computation of Diluted Net Income Per Share (Detail) - shares
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total 1,998,329 225,876
Equity incentive awards    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total 565,329 225,876
Convertible notes    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total [1] 716,500  
Capped call    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total [2] 716,500  
[1] Represents the base conversion of shares issuable upon conversion of the 2031 Notes, subject to potential conversion rate adjustments under the make-whole fundamental change provisions. Based on the initial conversion rate of 3.5825 shares per $1,000 principal amount, the base conversion would result in approximately 716,500 shares issuable. See Note 8, Convertible Notes.
[2] Represents the shares of Class A common stock underlying the Capped Call Transactions. Those shares are intended to offset the dilutive impact of Convertible Notes when Dave's stock price remains below the cap price of $421.34. See Note 8, Convertible Notes and Note 14, Stockholders' Equity.