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Stockholders' Equity - Fair Value of Options Granted Under Equity Incentive Plan and Shares Subject to Employee Stock Purchase Plan Valuation Assumptions (Detail) - Employee Stock Purchase Plan [Member] - $ / shares
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average risk-free interest rate 3.72% 4.27%
Expected dividend yield 0.00% 0.00%
Expected life 6 months 6 months
Expected volatility 56.00% 38.00%
Weighted average fair value $ 1.88 $ 2.86