CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Shares	Additional paid-in capital	Accumulated deficit	Accumulated Other Comprehensive (Loss) Income	Non- Controlling Interests
Beginning balance (in shares) at Sep. 30, 2021		15,931,485
Beginning balance at Sep. 30, 2021	$ 105,128	$ 3,945	$ 112,198	$ (11,015)	$ 0	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net loss	$ (337,018)			(337,262)		244
Stock issued in acquisitions (In shares)	9,573,210	9,573,210
Stock issued in acquisitions	$ 495,428	$ 2,393	493,035
Noncontrolling interest related to Envigo acquisition	880					880
Issuance of stock under employee stock plans (in shares)		93,594
Issuance of stock under employee stock plans	118	$ 24	94
Stock based compensation	24,202		24,202
Actuarial loss (net of tax)	2,725				2,725
Foreign currency translation adjustment	(8,225)				(8,225)
Cumulative currency translation realized through sale of subsidiary	0
Other	30					30
Reclassification of convertible note embedded derivative to equity (Note 7)	$ 78,258		78,258
Ending balance (in shares) at Sep. 30, 2022	25,598,289	25,598,289
Ending balance at Sep. 30, 2022	$ 359,766	$ 6,362	707,787	(348,277)	(5,500)	(606)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net loss	$ (105,140)			(104,902)		(238)
Stock issued in acquisitions (In shares)	0
Noncontrolling interest related to Envigo acquisition	$ (292)					(292)
Issuance of stock under employee stock plans (in shares)		178,880
Issuance of stock under employee stock plans	109	$ 44	65
Stock based compensation	7,844		7,844
Actuarial loss (net of tax)	(28)				(28)
Foreign currency translation adjustment	5,315				5,315
Cumulative currency translation realized through sale of subsidiary	762				762
Other	$ 154			(99)	(219)	472
Ending balance (in shares) at Sep. 30, 2023	25,777,169	25,777,169
Ending balance at Sep. 30, 2023	$ 268,490	$ 6,406	$ 715,696	$ (453,278)	$ 330	$ (664)