RESTRUCTURING CHARGES - Summary of the Restructuring and Other Related Charges (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 1,716	$ 3,079
Personnel related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	260	362
Facilities & Exit Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,167	2,524
Facility and Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	289	193
Cost of goods and services
Restructuring Cost and Reserve [Line Items]
Restructuring charges	322	541
Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 1,394	$ 2,538