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Revenue Recognition - Summary of Disaggregated Revenue (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Aug. 31, 2024 | Aug. 31, 2023
Disaggregation of Revenue [Line Items] |  |
Total Revenues | $ 216,964 | $ 228,987
Food Safety |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 159,345 | 166,278
Food Safety | Natural Toxins & Allergens |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 20,376 | 22,268
Food Safety | Bacterial & General Sanitation |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 39,899 | 45,224
Food Safety | Indicator Testing, Culture Media & Other |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 81,703 | 81,886
Food Safety | Biosecurity Products |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 11,779 | 11,090
Food Safety | Genomics Services |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 5,588 | 5,810
Animal Safety |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 57,619 | 62,709
Animal Safety | Biosecurity Products |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 20,806 | 22,686
Animal Safety | Genomics Services |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 15,878 | 17,255
Animal Safety | Life Sciences |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 1,733 | 1,661
Animal Safety | Veterinary Instruments & Disposables |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 12,523 | 12,932
Animal Safety | Animal Care & Other |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | $ 6,679 | $ 8,175

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