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LEASES - Weighted average remaining lease (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 30, 2021
Jun. 30, 2021
Jun. 30, 2020
Cash flows included in the measurement of lease liabilities:      
Operating cash flows from operating leases $ 346 $ 867  
Operating cash flows from finance leases 45 183  
Finance cash flows from finance leases 71 277 $ 330
Non-cash lease activity:      
Right-of-use assets obtained in exchange for new operating lease liabilities 4,990 6,165  
Right-of-use assets obtained in exchange for new finance lease liabilities $ 8 $ 17  
Operating lease, weighted-average remaining lease term (in years) 4 years 10 months 28 days 4 years 10 months 28 days  
Finance lease, weighted-average remaining lease term (in years) 3 years 5 months 4 days 3 years 5 months 4 days  
Operating lease, weighted-average discount rate (as a percent) 4.46% 4.46%  
Finance lease, weighted-average discount rate (as a percent) 4.86% 4.86%