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INVENTORIES (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Sep. 30, 2019
Inventory Disclosure [Abstract]    
Inventory, Raw Materials, Net of Reserves $ 32,904 $ 25,393
Work-in-process 15,009 15,928
Finished goods 3,461 2,946
Inventory, Net $ 51,374 $ 44,267