SUPPLEMENTAL BALANCE SHEET INFORMATION - Composition of Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
Other Assets, Noncurrent [Abstract]
Long-term advances to suppliers	$ 3,711	$ 3,681
Funded status of defined benefit plan	3,172	3,036
Other	3,756	3,362
Other assets	$ 10,638	$ 10,079