BUSINESS COMBINATIONS - Preliminary fair value of assets acquired and liabilities assumed (Details) - USD ($) $ in Thousands	Mar. 31, 2022	May 03, 2021
HistoTox Labs
Assets acquired and liabilities assumed:
Accounts receivable	$ 977
Unbilled receivables	337
Operating lease ROU asset	2,239
Property and equipment	3,929
Intangible assets	8,300
Goodwill	9,339
Accounts payable	(150)
Accrued expenses	(136)
Customer advances	(207)
Operating lease liability	(2,239)
Total	22,389
Bolder BioPATH
Assets acquired and liabilities assumed:
Cash.		$ 500
Accounts receivable	2,146
Unbilled receivables	1,798
Operating lease ROU asset	2,750
Property and equipment	6,523
Intangible assets	12,700
Other assets	34
Goodwill	36,206
Accounts payable	(153)
Accrued expenses	(243)
Deferred revenue	(662)
Deferred tax liability	(4,867)
Operating lease liability	(2,750)
Total	53,482
Gateway Pharmacology Laboratories LLC
Assets acquired and liabilities assumed:
Accounts receivable	422
Operating lease ROU asset	120
Property and equipment	359
Intangible assets	100
Other assets	9
Goodwill	2,207
Accounts payable	(54)
Accrued expenses	(72)
Deferred tax liability	(118)
Operating lease liability	(120)
Total	2,853
BioReliance Corporation
Assets acquired and liabilities assumed:
Property and equipment	175
Intangible assets	640
Total	815
Plato BioPharma Inc
Assets acquired and liabilities assumed:
Cash.	1,027
Accounts receivable	860
Operating lease ROU asset	2,582
Property and equipment	1,148
Intangible assets	5,100
Goodwill	8,880
Deferred tax liability	(1,551)
Operating lease liability	(2,566)
Other liabilities, net	(242)
Total	15,238
Envigo RMS Holding Corp
Assets acquired and liabilities assumed:
Cash.	3,091
Restricted cash	435
Accounts receivable	44,240
Inventory	39,138
Prepaid expenses and other current assets	18,960
Operating lease ROU asset	7,570
Property and equipment	83,608
Intangible assets	201,000
Other assets	7,676
Goodwill	356,947
Accounts payable	(17,298)
Accrued expenses and other liabilities	(22,382)
Fees invoiced in advance	(7,040)
Other liabilities	(3,834)
Operating lease liability	(2,729)
Long-term operating leases, net	(4,631)
Long-term debt	(140)
Long-term deferred tax liabilities	(31,148)
Noncontrolling interest	1,111
Total	674,574
Robinson Services, Inc.
Assets acquired and liabilities assumed:
Customer relationship	4,700
Non-complete agreement	300
Supply agreement	200
Goodwill	948
Total	6,148
Integrated Laboratory Systems, LLC (ILS)
Assets acquired and liabilities assumed:
Cash.	797
Accounts receivable	3,841
Prepaid expenses and other current assets	61
Property and equipment	2,237
Intangible assets	27,000
Goodwill	23,206
Accounts payable	(1,039)
Accrued expenses and other liabilities	(1,136)
Fees invoiced in advance	(1,696)
Total	53,271
Orient BioResource Center, Inc
Assets acquired and liabilities assumed:
Cash.	5,481
Accounts receivable	2,025
Inventory	8,800
Prepaid expenses and other current assets	2,609
Property and equipment	8,790
Intangible assets	21,700
Goodwill	14,530
Accounts payable	(476)
Accrued expenses and other liabilities	(354)
Fees invoiced in advance	(6,548)
Long-term deferred tax liabilities	(5,649)
Total	$ 50,908