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Equity Incentive Plans - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Jan. 01, 2025	Dec. 31, 2024	Jan. 01, 2024	Jul. 31, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average grant-date fair values of options granted			$ 2.71
Aggregate intrinsic value of options exercised	$ 200		$ 400
Unrecognized stock-based compensation of unvested options	$ 1,400		$ 1,400
Weighted-average period expected to recognize			10 months 24 days
Common stock reserved for future issuance	18,050,417		18,050,417			16,368,584
Description of Transaction of Future issuance			lesser of (i) 5% of the aggregate number of shares of common stock outstanding on the final day of the immediately preceding calendar year and (ii) such smaller number of shares of common stock as determined by the Company's board of directors (the "Board"), subject to certain limitations.
Stock based compensation	$ 700	$ 1,900	$ 3,500	$ 5,700
ESPP purchase			$ 433	450
Restricted Stock Units RSU
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period			4 years
Vesting percentage			25.00%
Unrecognized stock-based compensation of unvested options	15,700		$ 15,700
Weighted-average period expected to recognize			2 years 6 months
Stock based compensation	$ 1,700	2,200	$ 6,700	6,900
2021 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock available for issuance	7,668,386		7,668,386			5,931,302
Common stock reserved for future issuance	5,200,000		5,200,000		2,546,899		2,456,568
2021 Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Collected withholdings under plan			$ 300
Common stock reserved for future issuance	1,996,797		1,996,797		509,379	1,631,076	491,313	850,000
Stock based compensation	$ 100	$ 100	$ 300	$ 500
ESPP purchase, Shares	143,658		143,658
ESPP purchase	$ 400		$ 400

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