RESTRUCTURING CHARGES - Summary of Accrued Liability for the Restructuring and Related Charges (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Restructuring Reserve [Roll Forward]
Accrued liability beginning balance	$ 650	$ 682
Restructuring charges		1,716
Cash payment	(167)	(1,442)
Non-cash charges		(289)
Accrued liability ending balance	483	667
Personnel related costs
Restructuring Reserve [Roll Forward]
Accrued liability beginning balance	386	418
Restructuring charges		260
Cash payment	(74)	(275)
Non-cash charges		0
Accrued liability ending balance	312	403
Facilities & Exit Costs
Restructuring Reserve [Roll Forward]
Accrued liability beginning balance	264	264
Restructuring charges		1,167
Cash payment	(93)	(1,167)
Non-cash charges		0
Accrued liability ending balance	$ 171	264
Facility and Other Costs(1)
Restructuring Reserve [Roll Forward]
Accrued liability beginning balance		0
Restructuring charges		289
Cash payment		0
Non-cash charges		(289)
Accrued liability ending balance		$ 0