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Revenue Recognition - Summary of Disaggregated Revenue (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Feb. 29, 2024 | Feb. 28, 2023 | Feb. 29, 2024 | Feb. 28, 2023
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues, net | $ 228,812 | $ 218,255 | $ 687,428 | $ 580,637
Food Safety |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues, net | 157,754 | 151,542 | 488,435 | 377,528
Food Safety | Natural Toxins & Allergens |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues, net | 19,738 | 19,198 | 63,116 | 61,236
Food Safety | Bacterial & General Sanitation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues, net | 40,395 | 39,444 | 128,393 | 91,293
Food Safety | Indicator Testing, Culture Media & Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues, net | 81,168 | 77,955 | 246,812 | 179,293
Food Safety | Rodenticides, Insecticides & Disinfectants |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues, net | 10,136 | 9,550 | 32,180 | 29,502
Food Safety | Genomics Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues, net | 6,317 | 5,395 | 17,934 | 16,204
Animal Safety |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues, net | 71,058 | 66,713 | 198,993 | 203,109
Animal Safety | Rodenticides, Insecticides & Disinfectants |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues, net | 23,055 | 20,242 | 65,694 | 63,121
Animal Safety | Genomics Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues, net | 18,589 | 20,868 | 53,518 | 59,168
Animal Safety | Life Sciences |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues, net | 1,372 | 1,440 | 4,710 | 4,456
Animal Safety | Veterinary Instruments & Disposables |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues, net | 17,976 | 15,428 | 47,845 | 46,534
Animal Safety | Animal Care & Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues, net | $ 10,066 | $ 8,735 | $ 27,226 | $ 29,830

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