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LEASES - Components of lease expense (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 30, 2021
Jun. 30, 2021
Jun. 30, 2020
Operating lease costs:      
Fixed operating lease costs $ 292 $ 736  
Short-term lease costs 32 66  
Lease income (159) (477)  
Finance lease costs:      
Amortization of right-of-use asset expense 25 97  
Interest on finance lease liability 46 183 $ 200
Total lease cost $ 236 $ 605