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Business Combinations - Additional Information (Detail) - USD ($) $ in Thousands |  |  |  |  |  |  |  |  |  |  | 3 Months Ended | 12 Months Ended |  |
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Jun. 01, 2023 | Feb. 10, 2023 | Nov. 29, 2022 | Sep. 01, 2022 | Jul. 01, 2022 | Dec. 13, 2021 | Nov. 30, 2021 | Sep. 30, 2021 | Dec. 31, 2020 | Jul. 31, 2020 | May 31, 2023 | May 31, 2023 | May 31, 2022 | May 31, 2021 | Feb. 28, 2023 | Dec. 31, 2021
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash consideration for purchase of business |  |  | $ 37 |  | $ 1,310 |  |  |  |  |  |  |  |  |  |  |
Purchase price allocation for intangible assets |  |  |  |  | 620 |  |  |  |  |  |  |  |  |  |  |
Adjustments to intangible assets |  |  |  |  |  |  |  |  |  |  | $ 3,820 |  |  |  |  |
Adjustments to contingent liability |  |  |  |  |  |  |  |  |  |  | 1,070 |  |  |  |  |
Cash payable to former owner for purchase of business |  |  |  |  | 234 |  |  |  | $ 8,600 |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired |  |  |  |  |  |  |  |  |  |  |  | $ (11,721) | $ 38,745 | $ 50,771 |  |
Maximum potential Payments |  | $ 8,500 |  |  |  |  |  | $ 6,500 |  |  |  |  |  |  |  |
Maximum future royalty payments |  |  |  |  |  |  |  | 14,500 |  |  |  |  |  |  |  |
Performance milestone liability |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 300 |
Other non-current liabilities |  | 930 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Value, Acquisitions |  |  |  |  |  |  |  |  |  |  |  | 2,262,841 |  | 4,916 |  |
Goodwill |  |  |  |  |  |  |  |  |  |  | 2,137,496 | 2,137,496 | 142,704 | 131,476 |  |
Operating income (loss) |  |  |  |  |  |  |  |  |  |  |  | 37,515 | 58,618 | 74,169 |  |
Amortization expense for intangible assets |  |  |  |  |  |  |  |  |  |  |  | 71,085 | 9,600 | $ 7,753 |  |
Beef Cattle and Related Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash consideration for purchase of business |  |  |  |  |  |  |  |  |  | $ 2,351 |  |  |  |  |  |
Purchase price allocation for inventory |  |  |  |  |  |  |  |  |  | 51 |  |  |  |  |  |
Purchase price allocation for intangible assets |  |  |  |  |  |  |  |  |  | $ 2,300 |  |  |  |  |  |
Megazyme Ltd and Subsidiary Megazyme Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash consideration for purchase of business |  |  |  |  |  |  |  |  |  |  |  | 2,349 |  |  |  |
Contingent consideration potential payment |  |  |  |  |  |  |  |  | 2,500 |  |  |  |  |  |  |
Purchase price allocation for accounts receivable |  |  |  |  |  |  |  |  | 1,376 |  |  |  |  |  |  |
Purchase price allocation for inventory |  |  |  |  |  |  |  |  | 5,595 |  |  |  |  |  |  |
Purchase price allocation for land, property and equipment |  |  |  |  |  |  |  |  | 12,599 |  |  |  |  |  |  |
Purchase price allocation for Prepaid Expenses |  |  |  |  |  |  |  |  | 69 |  |  |  |  |  |  |
Purchase price allocation for other current liabilities |  |  |  |  |  |  |  |  | 1,815 |  |  |  |  |  |  |
Allocation of purchase price for contingent consideration potential payment |  |  |  |  |  |  |  |  | 2,458 |  |  |  |  |  |  |
Purchase price allocation for long-term liabilities |  |  |  |  |  |  |  |  | 319 |  |  |  |  |  |  |
Purchase price allocation for deferred tax liability |  |  |  |  |  |  |  |  | 3,306 |  |  |  |  |  |  |
Purchase price allocation for intangible assets |  |  |  |  |  |  |  |  | 22,945 |  |  |  |  |  |  |
Business acquisition Value of equity interest issued |  |  |  |  |  |  |  |  | 4,900 |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired |  |  |  |  |  |  |  |  | $ 39,800 |  |  |  |  |  |  |
CAPInnoVet, Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price allocation for accounts receivable |  |  |  |  |  |  |  | 308 |  |  |  |  |  |  |  |
Purchase price allocation for inventory |  |  |  |  |  |  |  | 531 |  |  |  |  |  |  |  |
Purchase price allocation for Prepaid Expenses |  |  |  |  |  |  |  | 296 |  |  |  |  |  |  |  |
Purchase price allocation for other current liabilities |  |  |  |  |  |  |  | 84 |  |  |  |  |  |  |  |
Purchase price allocation for long-term liabilities |  |  |  |  |  |  |  | 6,500 |  |  |  |  |  |  |  |
Purchase price allocation for intangible assets |  |  |  |  |  |  |  | 19,200 |  |  |  |  |  |  |  |
Purchase price allocation for accounts payable |  |  |  |  |  |  |  | 120 |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired |  |  |  |  |  |  |  | $ 17,900 |  |  |  |  |  |  |  |
Delf (UK) Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash consideration for purchase of business |  |  |  |  |  |  | $ 9,500 |  |  |  |  |  |  |  |  |
Purchase price allocation for accounts receivable |  |  |  |  |  |  | 1,059 |  |  |  |  |  |  |  |  |
Purchase price allocation for inventory |  |  |  |  |  |  | 972 |  |  |  |  |  |  |  |  |
Purchase price allocation for land, property and equipment |  |  |  |  |  |  | 152 |  |  |  |  |  |  |  |  |
Purchase price allocation for Prepaid Expenses |  |  |  |  |  |  | 31 |  |  |  |  |  |  |  |  |
Purchase price allocation for other current liabilities |  |  |  |  |  |  | 378 |  |  |  |  |  |  |  |  |
Purchase price allocation for deferred tax liability |  |  |  |  |  |  | 780 |  |  |  |  |  |  |  |  |
Purchase price allocation for intangible assets |  |  |  |  |  |  | 3,100 |  |  |  |  |  |  |  |  |
Purchase price allocation for accounts payable |  |  |  |  |  |  | $ 497 |  |  |  |  |  |  |  |  |
Genetic Veterinary Services, Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price allocation for accounts receivable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 38
Purchase price allocation for inventory |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 292
Purchase price allocation for land, property and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 399
Purchase price allocation for Prepaid Expenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 54
Purchase price allocation for other current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 321
Unearned revenue liability |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,900
Purchase price allocation for intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,500
Purchase price allocation for accounts payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 325
Payments to Acquire Businesses, Net of Cash Acquired |  |  |  |  |  | $ 11,300 |  |  |  |  |  |  |  |  |  |
Thaineo Biotech Co Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination, consideration transferred |  |  |  |  | $ 1,581 |  |  |  |  |  |  |  |  |  |  |
Corvium Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price allocation for land, property and equipment |  | 13 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price allocation for Prepaid Expenses |  | 66 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unearned revenue liability |  | 1,827 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price allocation for intangible assets |  | 10,180 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination, consideration transferred |  | 24,067 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash held in escrow |  | 9,004 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other non-current liabilities |  | 930 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on sale of minority interest |  |  |  |  |  |  |  |  |  |  |  | 1,500 |  |  |  |
Goodwill |  | $ 16,984 |  |  |  |  |  |  |  |  |  |  |  |  |  |
3M Food Safety Transaction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash consideration for purchase of business |  |  |  | $ 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Purchase price allocation for inventory |  |  |  | 18,403 |  |  |  |  |  |  |  |  |  |  |  |
Purchase price allocation for land, property and equipment |  |  |  | 25,832 |  |  |  |  |  |  |  |  |  |  |  |
Purchase price allocation for deferred tax liability |  |  |  | 352,481 |  |  |  |  |  |  |  |  |  |  |  |
Purchase price allocation for intangible assets |  |  |  | 1,560,000 |  |  |  |  |  |  |  |  |  |  |  |
Other non-current liabilities |  |  |  | $ 2,832 |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued in business acquisitions |  |  |  | 108,269,946 |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Value, Acquisitions |  |  |  | $ 2,200,000 |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  | 1,974,520 |  |  |  |  |  |  | 1,970,000 | 1,970,000 |  |  |  |
Business acquisition, goodwill, not deductible for tax purposes |  |  |  |  |  |  |  |  |  |  | 1,920,000 | 1,920,000 |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  | 919,959 | 910,978 |  |  |
Operating income (loss) |  |  |  |  |  |  |  |  |  |  |  | 44,373 | 42,258 |  |  |
Business Combination, Acquisition Related Costs |  |  |  |  |  |  |  |  |  |  |  | 58,175 |  |  |  |
Amortization expense for intangible assets |  |  |  |  |  |  |  |  |  |  |  | 60,872 |  |  |  |
Cost of goods sold |  |  |  |  |  |  |  |  |  |  |  | 3,245 |  |  |  |
BusinessCombinationConsiderationTransferredOther1 |  |  |  | $ 3,200,000 |  |  |  |  |  |  |  |  |  |  |  |
3M Food Safety Transaction | Accounts Receivable Prepaid expenses and other current assets [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  |  |  |  |  |  |  |  |  | $ 12,365 | 12,365 |  |  |  |
3M Food Safety Transaction | General and Administrative Expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition related fees and integration costs |  |  |  |  |  |  |  |  |  |  |  | 58,175 | $ 25,581 |  |  |
3M Food Safety Transaction | Postmerger Neogen Corp | PreMerger Neogen Shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minority interest ownership percentage by Noncontrolling owners |  |  |  | 49.90% |  |  |  |  |  |  |  |  |  |  |  |
3M Food Safety Transaction | Postmerger Neogen Corp | Neogen Food Safety Corporation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minority interest ownership percentage by Parent |  |  |  | 50.10% |  |  |  |  |  |  |  |  |  |  |  |
3M FSD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  | 279,541 |  |  |  |
Operating income (loss) |  |  |  |  |  |  |  |  |  |  |  | $ 28,200 |  |  |  |
Subsequent Event [Member] | Corvium Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Escrow balance released | $ 8,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI https://asc.fasb.org/extlink&oid=123586518&loc=d3e1043-128460 + Details
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