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Segmented Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2023
Research and Development Arrangement, Contract to Perform for Others [Line Items]      
Research and development costs $ 37,592 $ 41,838 $ 43,717
General and administrative costs 13,816 11,039 12,046
Other income 5,031 9,875 8,258
Net loss and comprehensive loss (46,377) (43,002) (47,505)
Preclinical Studies [Member]      
Research and Development Arrangement, Contract to Perform for Others [Line Items]      
Research and development costs 543 663 627
Clinical Trials [Member]      
Research and Development Arrangement, Contract to Perform for Others [Line Items]      
Research and development costs 15,805 21,301 21,873
Personnel Costs [Member]      
Research and Development Arrangement, Contract to Perform for Others [Line Items]      
Research and development costs 13,466 13,676 10,264
General and administrative costs 2,288 2,177 2,527
Non Cash Share Based Compensation [Member]      
Research and Development Arrangement, Contract to Perform for Others [Line Items]      
Research and development costs 7,013 5,813 10,812
General and administrative costs 4,536 3,625 5,558
Other Research And Development Costs [Member]      
Research and Development Arrangement, Contract to Perform for Others [Line Items]      
Research and development costs 765 385 141
General and administrative costs $ 6,992 $ 5,237 $ 3,961