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SEGMENT AND GEOGRAPHIC INFORMATION - Operating Segments Revenue and Operating Income (Loss) (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2022 USD ($) segment	Dec. 31, 2021 USD ($)	Sep. 30, 2022 USD ($)
SEGMENT INFORMATION
Number of segments \| segment	2
Revenue	$ 122,754	$ 84,211	$ 547,656
Operating Income (Loss)	(90,578)	(33,641)
Interest expense	(10,450)	(4,828)
Other (expense) income	(1,878)	(57,727)
(Loss) income before income taxes	(102,906)	(96,196)
Service
SEGMENT INFORMATION
Revenue	50,048	38,176
Product
SEGMENT INFORMATION
Revenue	72,706	46,035
Intersegment
SEGMENT INFORMATION
Revenue	1,125	320
Discovery and Safety Assessment Segment (DSA)
SEGMENT INFORMATION
Operating Income (Loss)	2,372	6,042
Discovery and Safety Assessment Segment (DSA) \| Service
SEGMENT INFORMATION
Revenue	39,971	31,875
Discovery and Safety Assessment Segment (DSA) \| Product
SEGMENT INFORMATION
Revenue	1,122	950
Research Models And Services Segment (RMS)
SEGMENT INFORMATION
Operating Income (Loss)	(71,272)	80
Research Models And Services Segment (RMS) \| Service
SEGMENT INFORMATION
Revenue	10,077	6,301
Research Models And Services Segment (RMS) \| Product
SEGMENT INFORMATION
Revenue	71,584	45,085
Unallocated Corporate Segment
SEGMENT INFORMATION
Operating Income (Loss)	$ (21,678)	$ (39,763)