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LEASES - Supplemental cash flow information (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Cash flows included in the measurement of lease liabilities:    
Operating cash flows from operating leases $ 1,389 $ 948
Operating cash flows from finance leases 184 283
Finance cash flows from finance leases 286 145
Non-cash lease activity:    
Right-of-use assets obtained in exchange for new operating lease liabilities 6,285 $ 448
Right-of-use assets obtained in exchange for new finance lease liabilities $ 17