Summary of Significant Accounting Policies - Additional Information (Details)	1 Months Ended				12 Months Ended
	Sep. 30, 2024 USD ($)	Jul. 31, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2024 USD ($) Segment	Dec. 31, 2023 USD ($)	Jan. 01, 2024
Accounting Policies [Line Items]
Net loss					$ 51,321,000	$ 64,732,000
Cash flows used in operating activities					49,257,000	53,288,000
Accumulated deficit					205,776,000	154,455,000
Cash, cash equivalents, short-term investments and long-term investments					$ 88,600,000
Number of operating segments | Segment					1
Number of reportable Segments | Segment					1
Uncollectible accrued interest write-offs					$ 0	0
Cash and cash equivalents					21,351,000	15,647,000
Investments					67,300,000	118,800,000
Maximum amount eligible to receive under cost-reimbursement contract award				$ 17,800,000
Net unrealized gain (loss) on available-for-sale investments					200,000	(600,000)
UGARF
Accounting Policies [Line Items]
Grant award amount		$ 200,000		$ 1,400,000
BMGF
Accounting Policies [Line Items]
Grant award amount	$ 2,000,000		$ 1,800,000
ASU 2023-07
Accounting Policies [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adoption Date							Jan. 01, 2024
Change in Accounting Principle, Accounting Standards Update, Early Adoption [true false]							true
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]							true
Initial Public Offering
Accounting Policies [Line Items]
Net loss					51,300,000	64,700,000
Cash flows used in operating activities					49,300,000	53,300,000
Accumulated deficit					$ 205,800,000	$ 154,500,000