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v3.25.2

Revenue Recognition - Summary of Disaggregated Revenue (Detail) - USD ($) $ in Thousands | 12 Months Ended
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May 31, 2025 | May 31, 2024 | May 31, 2023
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | $ 894,661 | $ 924,222 | $ 822,447
Food Safety |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 638,140 | 655,341 | 546,797
Food Safety | Natural Toxins & Allergens |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 77,058 | 82,240 | 82,567
Food Safety | Bacterial & General Sanitation |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 164,777 | 171,217 | 134,934
Food Safety | Indicator Testing, Culture Media And Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 325,915 | 334,636 | 267,178
Food Safety | Rodenticides, Insecticides & Disinfectants |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 46,971 | 42,965 | 39,655
Food Safety | Genomics Services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 23,419 | 24,283 | 22,463
Animal Safety |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 256,521 | 268,881 | 275,650
Animal Safety | Life Sciences |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 6,500 | 6,515 | 6,254
Animal Safety | Animal Care & Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 34,654 | 36,978 | 39,068
Animal Safety | Veterinary Instruments & Disposables |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 61,468 | 65,848 | 63,843
Animal Safety | Rodenticides, Insecticides & Disinfectants |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 88,063 | 88,732 | 87,423
Animal Safety | Genomics Services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | $ 65,836 | $ 70,808 | $ 79,062

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