SEGMENT AND GEOGRAPHIC INFORMATION - Operating Segments Revenue and Operating Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
SEGMENT INFORMATION
Revenue	$ 572,425	$ 547,656
Operating Income (Loss)	(81,460)	(263,452)
Interest expense	(43,019)	(29,704)
Other income (expense)	237	(59,293)
(Loss) income before income taxes	(124,242)	(352,449)
Depreciation and amortization	54,717	49,324
Capital expenditures	27,503	36,300
Assets	856,530	962,900
Corporate, Non-Segment
SEGMENT INFORMATION
Operating Income (Loss)	(71,802)	(96,436)
Depreciation and amortization	58	0
Service
SEGMENT INFORMATION
Revenue	223,813	202,978
Product
SEGMENT INFORMATION
Revenue	348,612	344,678
DSA
SEGMENT INFORMATION
Capital expenditures	13,314	16,224
Assets	304,015	280,308
DSA | Operating Segments
SEGMENT INFORMATION
Operating Income (Loss)	15,246	22,330
Depreciation and amortization	16,371	13,553
DSA | Service
SEGMENT INFORMATION
Revenue	180,348	161,113
DSA | Product
SEGMENT INFORMATION
Revenue	4,742	4,176
RMS
SEGMENT INFORMATION
Capital expenditures	14,189	20,076
Assets	552,515	682,592
RMS | Operating Segments
SEGMENT INFORMATION
Operating Income (Loss)	(24,904)	(189,346)
Depreciation and amortization	38,288	35,771
RMS | Service
SEGMENT INFORMATION
Revenue	43,465	41,865
RMS | Product
SEGMENT INFORMATION
Revenue	$ 343,870	$ 340,502