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v3.19.1

Disaggregated Revenue (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Feb. 28, 2019 | Feb. 28, 2018 | Feb. 28, 2019 | Feb. 28, 2018 | May 31, 2018 | May 31, 2017
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Total Revenues | $ 97,700 | $ 94,903 | $ 304,424 | $ 289,811 | $ 397,930 | $ 358,277
Food Safety |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Total Revenues | 51,113 | 47,313 | 157,046 | 142,810 |  |
Food Safety | Natural Toxins, Allergens & Drug Residues |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Total Revenues | 18,612 | 16,807 | 58,021 | 54,960 |  |
Food Safety | Bacterial & General Sanitation |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Total Revenues | 9,519 | 8,992 | 30,807 | 27,435 |  |
Food Safety | Culture Media & Other |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Total Revenues | 11,893 | 10,179 | 36,302 | 31,353 |  |
Food Safety | Rodenticides, Insecticides & Disinfectants |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Total Revenues | 5,953 | 7,359 | 18,521 | 18,175 |  |
Food Safety | Genomics Services |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Total Revenues | 5,136 | 3,976 | 13,395 | 10,887 |  |
Animal Safety |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Total Revenues | 46,587 | 47,590 | 147,378 | 147,001 |  |
Animal Safety | Rodenticides, Insecticides & Disinfectants |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Total Revenues | 13,256 | 14,255 | 48,921 | 49,422 |  |
Animal Safety | Genomics Services |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Total Revenues | 14,003 | 12,691 | 37,455 | 34,292 |  |
Animal Safety | Life Sciences |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Total Revenues | 1,823 | 2,769 | 5,794 | 7,589 |  |
Animal Safety | Veterinary Instruments & Disposables |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Total Revenues | 10,682 | 10,630 | 32,769 | 32,804 |  |
Animal Safety | Animal Care & Other |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Total Revenues | $ 6,823 | $ 7,245 | $ 22,439 | $ 22,894 |  |

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