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9. LEASES - Weighted-average Remaining Lease Terms (Details)
Sep. 30, 2023
Sep. 30, 2022
Leases [Abstract]    
Weighted-average remaining lease term - operating leases 3 years 9 months 18 days 1 year 6 months
Weighted-average remaining lease term -finance leases 10 months 24 days 1 year 6 months
Weighted-average discount rate - operating leases 5.40% 4.50%
Weighted-average discount rate - finance leases 5.50% 5.50%