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Shareholders' Equity - Stock-based compensation expense (Details) - USD ($)	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Share capital
Compensation expense related to nonvested	$ 3,026,000
Weighted average vesting period	7 months 6 days
Stock-based compensation expense	$ 4,035,000	$ 2,484,000
Restricted share units
Share capital
Stock-based compensation expense	3,336,000	1,639,000
Employee Stock Option
Share capital
Stock-based compensation expense	$ 699,000	$ 845,000

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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