v3.26.1
Liability Related to the Sale of Future Royalties - Summary of the Liability Related to the Sale of Future Royalties (Detail) - Sale Of Future Royalties [Member] - OMERS Royalty Purchase Agreement [Member]
$ in Thousands
9 Months Ended
Jun. 30, 2026
USD ($)
Nonmonetary Transaction [Line Items]  
Royalty liability - beginning balance $ 141,842
Royalty payable to purchaser (7,826)
Payments on royalty sale liability (19,472)
Interest expense 10,529
Royalty liability - ending balance $ 125,073