RESTRUCTURING CHARGES - Summary of Accrued Liability for the Restructuring and Related Charges (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2023	Mar. 31, 2022
Restructuring Reserve [Roll Forward]
Accrued liability beginning balance	$ 483	$ 650	$ 667	$ 682	$ 650	$ 682
Restructuring charges	78,334		4,766	1,716
Cash payment	(2,127)	(167)	(3,005)	(1,442)
Non-cash charges	(59,118)		(1,766)	(289)
Accrued liability ending balance	17,572	483	662	667	17,572	662
Personnel related costs
Restructuring Reserve [Roll Forward]
Accrued liability beginning balance	312	386	403	418	386	418
Restructuring charges	8,050		1,878	260
Cash payment	(244)	(74)	(1,883)	(275)
Non-cash charges	0		0	0
Accrued liability ending balance	8,118	312	398	403	8,118	398
Facilities & Exit Costs
Restructuring Reserve [Roll Forward]
Accrued liability beginning balance	171	264	264	264	264	264
Restructuring charges	11,166		1,122	1,167
Cash payment	(1,883)	(93)	(1,122)	(1,167)
Non-cash charges	0		0	0
Accrued liability ending balance	9,454	171	264	264	9,454	264
Non-cash facility and other
Restructuring Reserve [Roll Forward]
Accrued liability beginning balance	0	0	0	0	0	0
Restructuring charges	59,118		1,766	289
Cash payment	0	0	0	0
Non-cash charges	(59,118)		(1,766)	(289)
Accrued liability ending balance	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0