Stockholders' Equity - Stock-Based Compensation - Additional Information (Detail) - USD ($)	1 Months Ended		3 Months Ended		9 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average period					2 years 1 month 6 days
Unrecognized compensation costs			$ 700,000		$ 700,000
Proceeds from the issuance of common stock pursuant to the ESPP					$ 63,895
Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of stock options granted					152,328	120,182
Amended and Restated ESPP [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average period					9 months 18 days
Unrecognized compensation costs			$ 22,000,000,000		$ 22,000,000,000
Purchase price of common stock as percentage of fair market value					85.00%
Increase in number of shares of common stock available for issuance		14,860
Issuance of common stock under employee stock purchase plan			12,588	0	19,437
Proceeds from the issuance of common stock pursuant to the ESPP			$ 39,000		$ 64,000
2013 Equity Incentive Award Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Increase in the number of shares of common stock reserved under the plan	89,161