BUSINESS COMBINATIONS - Narrative (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands								12 Months Ended
	Jul. 07, 2022	Apr. 25, 2022	Jan. 27, 2022	Jan. 10, 2022	Dec. 29, 2021	Nov. 05, 2021	Oct. 04, 2021	Sep. 30, 2023	Sep. 30, 2022
BUSINESS COMBINATIONS
Consideration in cash								$ 0	$ 297,712
Revenue								572,425	547,656
Consolidated net loss								$ (105,140)	(337,018)
Plato BioPharma Inc
BUSINESS COMBINATIONS
Consideration in cash							$ 10,530
Business acquisition, equity interest issued or issuable (in shares)							57,587
Business acquisition, equity interest issued or issuable							$ 1,776
Debt, principal amount							$ 3,000
Plato BioPharma Inc | Customer relationships
BUSINESS COMBINATIONS
Weighted-average estimated useful life								8 years
Envigo RMS Holding Corp
BUSINESS COMBINATIONS
Consideration in cash						$ 217,808
Business acquisition, equity interest issued or issuable (in shares)						8,245,918
Business acquisition, equity interest issued or issuable						$ 439,590
Shares issuable upon the exercise of stock option (in shares)						790,620
Exercisable (in dollars per share)						$ 9,930
Share price (in dollars per share)						$ 44,800
Total value of options						$ 35,418
Value of options excluded from purchase price						18,242
Vested stock options reflected as purchase consideration						17,176
Transaction costs									7,700
Revenue									346,641
Consolidated net loss						2,222			(196,919)
Unrecognized tax benefit						1,861
Goodwill deductible for tax purposes						$ 50,428
Envigo RMS Holding Corp | Customer relationships
BUSINESS COMBINATIONS
Weighted-average estimated useful life								12 years 6 months
Envigo RMS Holding Corp | Intellectual property
BUSINESS COMBINATIONS
Weighted-average estimated useful life								8 years 9 months 18 days
Robinson Services, Inc.
BUSINESS COMBINATIONS
Consideration in cash					$ 3,250
Business acquisition, equity interest issued or issuable (in shares)					70,633
Business acquisition, equity interest issued or issuable					$ 2,898
Robinson Services, Inc. | Customer relationships
BUSINESS COMBINATIONS
Weighted-average estimated useful life								7 years 6 months
Integrated Laboratory Systems, LLC (ILS)
BUSINESS COMBINATIONS
Consideration in cash				$ 38,993
Business acquisition, equity interest issued or issuable (in shares)				429,118
Business acquisition, equity interest issued or issuable				$ 14,466
Consolidated net loss									(1,075)
Escrowed amount				3,800
Settlement of a preexisting relationship				$ (15)
Revenue									16,881
Integrated Laboratory Systems, LLC (ILS) | Customer relationships
BUSINESS COMBINATIONS
Weighted-average estimated useful life								9 years
Orient BioResource Center, Inc
BUSINESS COMBINATIONS
Consideration in cash			$ 26,522
Business acquisition, equity interest issued or issuable (in shares)			677,339
Business acquisition, equity interest issued or issuable			$ 18,410
Weighted-average estimated useful life								10 years 1 month 6 days
Revenue									35,726
Consolidated net loss									$ 5,808
Settlement of a preexisting relationship			1,017
Liabilities incurred			$ 3,325
Period for payment of consideration			18 months
Histion LLC Acquisition
BUSINESS COMBINATIONS
Consideration in cash		$ 950
Business acquisition, equity interest issued or issuable (in shares)		17,618
Business acquisition, equity interest issued or issuable		$ 364
Debt, principal amount		$ 433
Protypia, Inc.
BUSINESS COMBINATIONS
Consideration in cash	$ 9,460
Business acquisition, equity interest issued or issuable (in shares)	74,997
Business acquisition, equity interest issued or issuable	$ 806
Debt, principal amount	$ 600
Protypia, Inc. | Intellectual property
BUSINESS COMBINATIONS
Weighted-average estimated useful life								8 years 1 month 6 days