Summary of Significant Accounting Policies - Additional Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2026 USD ($) lease financialInstitution shares	Sep. 30, 2025 USD ($) shares	Sep. 30, 2026 USD ($) lease financialInstitution shares	Sep. 30, 2025 USD ($) shares	Dec. 31, 2025 USD ($)
Property, Plant, and Equipment [Line Items]
Cash and cash equivalents	$ 131,963,000		$ 131,963,000		$ 15,483,000
Number of financial institutions used for cash deposits | financialInstitution	2		2
Depreciation expense	$ 38,000	$ 40,000	$ 105,000	$ 126,000
Impairment losses	0	0	0	0
Government assistance, income	$ 0	$ 0	$ 0	$ 1,000,000.0
Number of existing leases | lease	3		3
January 2024 Pre-Funded Warrants
Property, Plant, and Equipment [Line Items]
Warrant exercised (in shares) | shares	858,015	858,015	858,015	858,015
May 2025 Pre-Funded Warrants
Property, Plant, and Equipment [Line Items]
Warrant exercised (in shares) | shares	4,619,867	8,666,667	4,619,867	8,666,667
February 2026 Pre-Funded Warrants
Property, Plant, and Equipment [Line Items]
Warrant exercised (in shares) | shares	22,294,900		22,294,900
Minimum
Property, Plant, and Equipment [Line Items]
Estimated useful life (in years)	3 years		3 years
Lease term (in months)	12 months		12 months
Maximum
Property, Plant, and Equipment [Line Items]
Estimated useful life (in years)	13 years		13 years
Lease term (in months)	60 months		60 months
United States
Property, Plant, and Equipment [Line Items]
Cash and cash equivalents	$ 94,900,000		$ 94,900,000
Germany
Property, Plant, and Equipment [Line Items]
Cash and cash equivalents	37,000,000.0		37,000,000.0
Australian research and development tax incentive	4,200,000		4,200,000
Australia
Property, Plant, and Equipment [Line Items]
Cash and cash equivalents	$ 100,000		$ 100,000
Government R&D assistance rate (as a percent)			43.50%