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Subsequent Events	12 Months Ended
Subsequent Events	Sep. 30, 2025
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On November 13, 2025, the Company entered into an amendment to a lease agreement for the Company's premises in South San Francisco, California, in order to consolidate other offices in South San Francisco into a single location. This amendment increases the leased premises by approximately 33,000 square feet ("Additional Premises") and extends the termination date of the lease until June 30, 2036. In accordance with the amended lease agreement, the monthly base rent for the entire premises is approximately $0.5 million at commencement and includes provisions for rent increases by 3% annually and provides for base rent abatement with respect to the original premises for 15 months and base rent abatement with respect to the Additional Premises for 12 months. The Company is also responsible for utilities, maintenance, insurance, and property taxes. The landlord will provide the Company with a tenant improvement allowance in connection with the Company’s improvements to the premises of approximately $24.4 million. The amendment also gives the Company the right, on or before December 31, 2026, to elect to expand the premises to include additional space in the building of approximately 33,000 square feet. * * * * *