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Schedule of valuation allowance (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2022
Income Tax Disclosure [Abstract]      
Balance at beginning of the period $ 12,611 $ 18,386 $ 19,080
Additions 1,481 2,047 1,308
Decreases (1,258) (7,481) (30)
Decrease in disposal of a subsidiary (1) (64) (80)
Foreign exchange impact (284) (277) (1,892)
Balance at end of the period $ 12,549 $ 12,611 $ 18,386