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LEASES - Components of lease expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Operating lease costs:    
Fixed operating lease costs $ 1,464 $ 906
Short-term lease costs 76 42
Lease income (657) (636)
Finance lease costs:    
Amortization of right-of-use asset expense 103 145
Interest on finance lease liability 184 283
Total lease cost $ 1,170 $ 740