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Business Combinations - Additional Information (Detail) - USD ($) $ in Thousands |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 10, 2023 | Sep. 01, 2022 | Jul. 01, 2022 | Nov. 30, 2022 | Feb. 29, 2024 | Aug. 31, 2023 | Feb. 28, 2023 | Nov. 30, 2022 | Feb. 29, 2024 | Feb. 28, 2023 | Oct. 31, 2023 | May 31, 2023
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cash consideration for purchase of business |  |  | $ 1,310 | $ 37 |  |  |  |  |  |  |  |
Purchase price allocation for accounts receivable |  |  | 177 |  |  |  |  |  |  |  |  |
Purchase price allocation for inventory |  |  | 232 |  |  |  |  |  |  |  |  |
Purchase price allocation for land, property and equipment |  |  | 16 |  |  |  |  |  |  |  |  |
Purchase price allocation for intangible assets |  |  | 620 |  |  |  |  |  |  |  |  |
Purchase price allocation for accounts payable |  |  | 98 |  |  |  |  |  |  |  |  |
Purchase price allocation for deferred tax liability |  |  | 124 |  |  |  |  |  |  |  |  |
Purchase price allocation for other current liabilities |  |  | 6 |  |  |  |  |  |  |  |  |
Purchase price allocation for other non-current assets |  |  | 6 |  |  |  |  |  |  |  |  |
Cash paid to former owner for purchase of business |  |  |  |  |  |  |  |  |  |  | $ 234 |
Purchase price allocation for Prepaid Expenses |  |  | 3 |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired |  |  |  |  |  |  |  |  | $ 0 | $ (13,237) |  |
Maximum potential Payments | $ 8,500 |  |  |  |  |  |  |  |  |  |  |
Other non-current liabilities | (930) |  |  |  |  |  |  |  |  |  |  |
Adjustments to intangible assets |  |  |  |  |  | $ 100 |  |  |  |  |  |
Stock Issued During Period, Value, Acquisitions |  |  |  |  |  |  |  | $ 2,262,841 |  |  |  |
Goodwill |  |  |  |  | $ 2,136,338 |  |  |  | 2,136,338 |  |  | $ 2,137,496
Operating Income (Loss) |  |  |  |  | 12,023 |  | $ 15,684 |  | 45,623 | 14,090 |  |
Amortization expense for acquired intangible assets |  |  |  |  | 23,704 |  | 22,926 |  | 71,101 | 47,995 |  |
Thaineo Biotech Co Ltd |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Consideration for purchase of business |  |  | $ 1,581 |  |  |  |  |  |  |  |  |
Three M Food Safety Transaction [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchase price allocation for inventory |  | $ 18,403 |  |  |  |  |  |  |  |  |  |
Purchase price allocation for land, property and equipment |  | 25,832 |  |  |  |  |  |  |  |  |  |
Purchase price allocation for intangible assets |  | 1,559,805 |  |  |  |  |  |  |  |  |  |
Purchase price allocation for deferred tax liability |  | 352,636 |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |  |
Non-cash consideration |  | 3,200,000 |  |  |  |  |  |  |  |  |  |
Goodwill |  | 1,974,870 |  |  | 1,970,000 |  |  |  | 1,970,000 |  |  |
Business acquisition, goodwill, not deductible for tax purposes |  |  |  |  | 1,920,000 |  |  |  | 1,920,000 |  |  |
Revenues |  |  |  |  | 228,812 |  | 218,255 |  | 687,428 | 678,149 |  |
Operating Income (Loss) |  |  |  |  | 12,023 |  | $ 15,684 |  | 45,623 | $ 19,121 |  |
Three M Food Safety Transaction [Member] | Accounts Receivable Prepaid expenses and other current assets [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  |  |  | $ 461 |  |  |  | $ 461 |  |  | $ 12,365
Corvium Inc [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchase price allocation for land, property and equipment | 13 |  |  |  |  |  |  |  |  |  |  |
Purchase price allocation for intangible assets | 10,280 |  |  |  |  |  |  |  |  |  |  |
Consideration for purchase of business | 24,067 |  |  |  |  |  |  |  |  |  |  |
Unearned revenue liability | 1,827 |  |  |  |  |  |  |  |  |  |  |
Purchase price allocation for Prepaid Expenses | 66 |  |  |  |  |  |  |  |  |  |  |
Other non-current liabilities | (930) |  |  |  |  |  |  |  |  |  |  |
Escrow Deposit | 9,004 |  |  |  |  |  |  |  |  |  |  |
Escrow balance released |  |  |  |  |  | $ 8,000 |  |  |  |  |  |
Goodwill | $ 16,884 |  |  |  |  |  |  |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Finite lived intangible assets, useful life |  |  |  |  | 2 years |  |  |  | 2 years |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Finite lived intangible assets, useful life |  |  |  |  | 25 years |  |  |  | 25 years |  |  |
Garden SpinCo [Member] | Three M Food Safety Transaction [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Non-cash consideration by additional financing |  | $ 1,000,000 |  |  |  |  |  |  |  |  |  |
Postmerger Neogen Corp [Member] | Garden SpinCo [Member] | Three M Food Safety Transaction [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Minority interest ownership percentage by Parent |  | 50.10% |  |  |  |  |  |  |  |  |  |
Postmerger Neogen Corp [Member] | Premerger Neogen Shareholders [Member] | Three M Food Safety Transaction [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Minority interest ownership percentage by Noncontrolling owners |  | 49.90% |  |  |  |  |  |  |  |  |  |

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