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LEASES - LEASE COST (Details) - USD ($)
$ in Thousands
3 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
Amortization of right-of-use assets $ 1,246 $ 1,161
Interest on lease liabilities 221 247
Total finance lease cost 1,467 1,408
Operating lease cost 2,089 1,392
Short-term lease cost 127 454
Variable lease cost 153 707
Total lease cost $ 3,836 $ 3,961