Collaboration and License Agreements - Receivables and Contract Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Receivables included in accounts receivable	$ 0	$ 0
Contract liabilities included in deferred revenue	$ 0	$ 866

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

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