BUSINESS COMBINATIONS - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands								3 Months Ended				6 Months Ended		12 Months Ended
	Jul. 07, 2022	Apr. 25, 2022	Jan. 27, 2022	Jan. 10, 2022	Dec. 29, 2021	Nov. 05, 2021	Oct. 04, 2021	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2023	Mar. 31, 2022	Sep. 30, 2022
BUSINESS COMBINATIONS
Consideration in cash												$ 0	$ 288,702
Revenue								$ 151,463		$ 140,313		274,217	224,524	$ 547,656
Net loss								(9,994)	$ (87,323)	$ (6,087)	$ (83,047)	$ (97,317)	$ (89,134)
Plato BioPharma Inc
BUSINESS COMBINATIONS
Consideration in cash							$ 10,530
Shares issued							57,587
Common shares value							$ 1,776
Intangible assets							4,800
Plato BioPharma Inc | Promissory Note
BUSINESS COMBINATIONS
Principal amount							$ 3,000
Plato BioPharma Inc | Customer Relationships
BUSINESS COMBINATIONS
Weighted-average estimated useful life												8 years
Envigo RMS Holding Corp
BUSINESS COMBINATIONS
Aggregate consideration paid, including adjustments for net working capital						$ 217,808
Shares issued						8,245,918
Common shares value						$ 439,590
Shares issuable upon the exercise of stock option						790,620
Exercisable weighted-average exercise price (in dollars per share)						$ 9.93
Share Price						$ 44.80
Total value of options						$ 35,418
Value of options excluded from purchase price						18,242
Vested stock options reflected as purchase consideration						17,176
Goodwill deductible for tax purposes						50,428
Net loss						2,222
Unrecognized tax benefit						$ 1,861
Envigo RMS Holding Corp | Customer Relationships
BUSINESS COMBINATIONS
Weighted-average estimated useful life						12 years 6 months
Intangible assets						$ 251,000
Envigo RMS Holding Corp | Intellectual property
BUSINESS COMBINATIONS
Weighted-average estimated useful life						8 years 9 months 18 days
Intangible assets						$ 49,000
Robinson Services, Inc.
BUSINESS COMBINATIONS
Aggregate consideration paid, including adjustments for net working capital					$ 3,250
Shares issued					70,633
Common shares value					$ 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
Shares issued				429,118
Common shares value				$ 14,466
Escrowed amount				3,800
Settlement of a preexisting relationship				15
Intangible assets				$ 22,300
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
Shares issued			677,339
Common shares value			$ 18,410
Weighted-average estimated useful life			10 years
Settlement of a preexisting relationship			$ 1,017
Period for payment of consideration			18 months
Liabilities incurred			$ 3,325
Gain or loss on settlement			0
Intangible assets			13,400
Goodwill deductible for tax purposes			$ 0
Histion LLC Acquisition
BUSINESS COMBINATIONS
Consideration in cash		$ 950
Shares issued		17,618
Common shares value		$ 364
Principal amount		$ 433
Protypia, Inc.
BUSINESS COMBINATIONS
Consideration in cash	$ 9,460
Shares issued	74,997
Common shares value	$ 806
Principal amount	$ 600
Weighted-average estimated useful life	8 years 7 months 6 days
Intangible assets								$ 5,600				$ 5,600
Goodwill deductible for tax purposes	$ 0