Stock-Based Compensation - Summary of Stock Option Activity (Detail) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of Shares, Outstanding at Beginning Balance | shares	1,112,275
Number of shares, Assumed in reverse recapitalization | shares	32,685
Number of Shares, Granted | shares	1,065,973
Number of Shares, Exercised | shares	(196,740)
Number of Shares, Cancelled | shares	(10,727)
Number of Shares, Outstanding at Ending Balance | shares	2,003,466	1,112,275
Number of shares, Vested and expected to vest | shares	2,003,466
Number of Shares, Exercisable | shares	622,057
Weighted- Average Exercise Price, Outstanding at Beginning Balance | $ / shares	$ 7.5
Weighted- Average Exercise Price, Assumed in reverse recapitalization | $ / shares	7.56
Weighted- Average Exercise Price, Granted | $ / shares	17.16
Weighted- Average Exercise Price, Exercised | $ / shares	6.99
Weighted- Average Exercise Price, Cancelled | $ / shares	17
Weighted- Average Exercise Price, Outstanding at Ending Balance | $ / shares	12.71	$ 7.5
Weighted- Average Exercise Price, Vested and expected to vest | $ / shares	12.71
Weighted- Average Exercise Price, Exercisable | $ / shares	$ 7.31
Weighted Average Remaining Contractual Term, Outstanding	8 years 5 months 19 days	6 years 10 months 13 days
Weighted Average Remaining Contractual Term, Vested and expected to vest	8 years 5 months 19 days
Weighted Average Remaining Contractual Term, Exercisable	6 years 9 months 18 days
Aggregate Intrinsic Value, Outstanding Beginning Balance | $	$ 10,712
Aggregate Intrinsic Value, Outstanding Ending Balance | $	62,828	$ 10,712
Aggregate Intrinsic Value, Vested and expected to vest | $	62,828
Aggregate Intrinsic Value, Exercisable | $	$ 21,940