Collaboration and License Agreements - Revenue (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 0	$ 15,825	$ 3,551	$ 224,638
GSK
Disaggregation of Revenue [Line Items]
Revenue	0	277	2,685	29,600
Horizon
Disaggregation of Revenue [Line Items]
Revenue	0	1,539	0	23,206
Takeda
Disaggregation of Revenue [Line Items]
Revenue	0	14,009	866	146,477
Janssen
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	355
Amgen
Disaggregation of Revenue [Line Items]
Revenue	$ 0	$ 0	$ 0	$ 25,000

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details