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v3.19.2

Segment Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
May 31, 2019 | Feb. 28, 2019 | Nov. 30, 2018 | Aug. 31, 2018 | May 31, 2018 | Feb. 28, 2018 | Nov. 30, 2017 | Aug. 31, 2017 | May 31, 2019 | May 31, 2018 | May 31, 2017
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Product revenues to external customers |  | $ 109,762 | $ 97,700 | $ 107,098 | $ 99,626 | $ 108,120 | $ 94,903 | $ 100,698 | $ 94,209 | $ 414,186 | $ 397,930 | $ 358,277
Operating income (loss) |  |  |  |  |  |  |  |  |  | 68,094 | 70,194 | 64,945
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 17,624 | 17,058 | 14,691
Total assets |  | 695,740 |  |  |  | 618,009 |  |  |  | 695,740 | 618,009 | 528,409
Expenditures for long-lived assets |  |  |  |  |  |  |  |  |  | 14,661 | 20,946 | 14,578
Operating Segments | Food Safety |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Product revenues to external customers |  |  |  |  |  |  |  |  |  | 213,474 | 194,477 | 170,034
Operating income (loss) |  |  |  |  |  |  |  |  |  | 39,020 | 34,561 | 33,971
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 9,525 | 9,083 | 7,088
Total assets |  | 206,267 |  |  |  | 186,570 |  |  |  | 206,267 | 186,570 | 190,895
Expenditures for long-lived assets |  |  |  |  |  |  |  |  |  | 8,916 | 10,538 | 10,332
Operating Segments | Animal Safety |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Product revenues to external customers |  |  |  |  |  |  |  |  |  | 200,712 | 203,453 | 188,243
Operating income (loss) |  |  |  |  |  |  |  |  |  | 33,875 | 39,529 | 34,841
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 8,099 | 7,975 | 7,603
Total assets |  | 221,950 |  |  |  | 220,629 |  |  |  | 221,950 | 220,629 | 210,927
Expenditures for long-lived assets |  |  |  |  |  |  |  |  |  | 5,745 | 10,408 | 4,246
Product Revenues |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Product revenues to external customers |  |  |  |  |  |  |  |  |  | 339,439 | 331,288 | 303,148
Product Revenues | Operating Segments | Food Safety |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Product revenues to external customers |  |  |  |  |  |  |  |  |  | 190,675 | 174,553 | 154,431
Product Revenues | Operating Segments | Animal Safety |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Product revenues to external customers |  |  |  |  |  |  |  |  |  | 148,764 | 156,735 | 148,717
Service Revenues |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Product revenues to external customers |  |  |  |  |  |  |  |  |  | 74,747 | 66,642 | 55,129
Service Revenues | Operating Segments | Food Safety |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Product revenues to external customers |  |  |  |  |  |  |  |  |  | 22,799 | 19,924 | 15,603
Service Revenues | Operating Segments | Animal Safety |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Product revenues to external customers |  |  |  |  |  |  |  |  |  | 51,948 | 46,718 | 39,526
Corporate and Eliminations | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Operating income (loss) | [1] |  |  |  |  |  |  |  |  | (4,801) | (3,896) | (3,867)
Total assets | [1] | $ 267,523 |  |  |  | $ 210,810 |  |  |  | $ 267,523 | $ 210,810 | $ 126,587
[1] | Includes corporate assets, including cash and cash equivalents, marketable securities, current and deferred tax accounts, and overhead expenses not allocated to specific business segments. Also includes the elimination of intersegment transactions and non-controlling interests.

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