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Fair Value of Financial Assets and Liabilities - Additional Information (Detail) - USD ($)
shares in Thousands
 1 Months Ended 3 Months Ended 9 Months Ended
Apr. 30, 2023
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]          
Transfers between Level 1, Level 2 and Level 3   $ 0 $ 0 $ 0 $ 0
Omers Royalty Sale Agreement [Member]          
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]          
Proceeds from sale of future royalties $ 200,000,000        
Percentage of future quarterly royalty payments on net sales received in cash 54.50%        
Future quarterly royalty payments, description after June 30, 2023, through June 30, 2032, subject to a cap on aggregate payments equal to 1.42 times the purchase price.        
Series 1 Nonconvertible Preferred Stock [Member]          
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]          
Preferred stock, shares outstanding   1,930   1,930  
Change in fair value of nonconvertible preferred stock   $ 0 $ 0 $ 0 $ 0