Subleases (Details)		1 Months Ended		3 Months Ended		6 Months Ended	9 Months Ended
	Nov. 01, 2024 USD ($) ft²	Oct. 31, 2024	Mar. 31, 2024 USD ($) ft²	Sep. 30, 2024 USD ($) ft² lease	Sep. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Sep. 30, 2024 USD ($) ft² lease item	Sep. 30, 2023 USD ($)
Lessee, Lease, Description [Line Items]
Number of asset groups identified | item							3
Discount rate				9.70%			9.70%
Impairment of long-lived assets (non-cash)				$ 1,562,000			$ 4,513,000
Vacant General Laboratory Space
Lessee, Lease, Description [Line Items]
Impairment of long-lived assets (non-cash)				$ 700,000
Sublease
Lessee, Lease, Description [Line Items]
Sublease term			2 years
Asset Groups Subject To Impairment Evaluation
Lessee, Lease, Description [Line Items]
Number of asset groups identified | item							2
Operating sublease income							$ 800,000
Remaining vacant space for sublease | ft²				11,000			11,000
South San Francisco
Lessee, Lease, Description [Line Items]
Area of subleased property | ft²			8,000	107,000			107,000
Sublease term			2 years
Option to extend			false
Monthly base rent			$ 38,000
Expected sublease income			$ 900,000
Operating sublease income				$ 2,204,000	$ 2,090,000		$ 6,498,000	$ 6,270,000
Total Area | ft²				162,000			162,000
Number of separate Subleases entered | lease				3			3
Remaining vacant space for sublease | ft²				31,000			31,000
Increase in annual base rent (as a percent)			3.00%
South San Francisco | Subsequent Events
Lessee, Lease, Description [Line Items]
Area of subleased property | ft²	11,000
Sublease term	3 years
Option to extend		true
Monthly base rent	$ 16,250
Increase in annual base rent (as a percent)	3.00%
South San Francisco | Sublease
Lessee, Lease, Description [Line Items]
Expected sublease income							$ 600,000
Discount rate				9.70%			9.70%
Impairment of long-lived assets (non-cash)				$ 900,000
South San Francisco | Forecast | Subsequent Events
Lessee, Lease, Description [Line Items]
Operating sublease income	$ 3,100,000
South San Francisco | Asset Groups Subject To Impairment Evaluation
Lessee, Lease, Description [Line Items]
Impairment of long-lived assets (non-cash)						$ 3,000,000.0