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9. LEASES - Lease costs (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Leases [Abstract]    
Operating lease cost [1] $ 267 $ 113
Finance lease cost:    
Depreciation expense of financed assets 197 379
Interest on lease obligations $ 33 $ 38
[1] Included in general and administrative expenses.