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9. LEASES - Weighted-average Remaining Lease Terms (Details) | Sep. 30, 2023 | Sep. 30, 2022
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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%

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