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Segment Information and Geographic Data (Tables) | 6 Months Ended
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Nov. 30, 2020
Segment Information | Segment information follows:
|  |  |  |  |  |  |  | Corporate and |  |  |  |
|  | Food |  |  | Animal |  |  | Eliminations |  |  |  |
(in thousands) |  | Safety |  |  | Safety |  |  | (1) |  |  | Total |
As of and for the three months ended November 30, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |
Product revenues to external customers |  | $ | 51,323 |  |  | $ | 41,214 |  |  | $ | — |  |  | $ | 92,537 |
Service revenues to external customers |  |  | 6,211 |  |  |  | 16,252 |  |  |  | — |  |  |  | 22,463 |
Total revenues to external customers |  |  | 57,534 |  |  |  | 57,466 |  |  |  | — |  |  |  | 115,000 |
Operating income (loss) |  |  | 8,960 |  |  |  | 12,246 |  |  |  | (1,961 | ) |  |  | 19,245 |
Total assets |  |  | 226,735 |  |  |  | 228,126 |  |  |  | 390,765 |  |  |  | 845,626 |
As of and for the three months ended November 30, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |
Product revenues to external customers |  | $ | 51,188 |  |  | $ | 36,199 |  |  | $ | — |  |  | $ | 87,387 |
Service revenues to external customers |  |  | 5,666 |  |  |  | 14,750 |  |  |  | — |  |  |  | 20,416 |
Total revenues to external customers |  |  | 56,854 |  |  |  | 50,949 |  |  |  | — |  |  |  | 107,803 |
Operating income (loss) |  |  | 9,556 |  |  |  | 9,729 |  |  |  | (1,013 | ) |  |  | 18,272 |
Total assets |  |  | 212,928 |  |  |  | 224,058 |  |  |  | 313,605 |  |  |  | 750,591 |
(1) | Includes corporate assets, consisting principally of 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.
|  |  |  |  |  |  |  | Corporate and |  |  |  |
|  | Food |  |  | Animal |  |  | Eliminations |  |  |  |
(in thousands) |  | Safety |  |  | Safety |  |  | (1) |  |  | Total |
As of and for the six months ended November 30, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product revenues to external customers |  | $ | 99,986 |  |  | $ | 80,486 |  |  | $ | — |  |  | $ | 180,472 |
Service revenues to external customers |  |  | 11,733 |  |  |  | 32,120 |  |  |  | — |  |  |  | 43,853 |
Total revenues to external customers |  |  | 111,719 |  |  |  | 112,606 |  |  |  | — |  |  |  | 224,325 |
Operating income (loss) |  |  | 16,923 |  |  |  | 24,411 |  |  |  | (3,194 | ) |  |  | 38,140 |
As of and for the six months ended November 30, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product revenues to external customers |  | $ | 97,065 |  |  | $ | 72,270 |  |  | $ | — |  |  | $ | 169,335 |
Service revenues to external customers |  |  | 10,811 |  |  |  | 29,081 |  |  |  | — |  |  |  | 39,892 |
Total revenues to external customers |  |  | 107,876 |  |  |  | 101,351 |  |  |  | — |  |  |  | 209,227 |
Operating income (loss) |  |  | 18,690 |  |  |  | 18,029 |  |  |  | (2,183 | ) |  |  | 34,536 |
(1) | Includes elimination of intersegment transactions.
Disaggregated Revenue | The following table presents the Company’s revenue disaggregated by geographic location:
|  | Three months ended |  |  | Six months ended |
|  | November 30, |  |  | November 30, |
(in thousands) |  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
Domestic |  | $ | 69,832 |  |  | $ | 63,317 |  |  | $ | 137,156 |  |  | $ | 126,657 |
International |  |  | 45,168 |  |  |  | 44,486 |  |  |  | 87,169 |  |  |  | 82,570 |
Total revenue |  |  | 115,000 |  |  |  | 107,803 |  |  |  | 224,325 |  |  |  | 209,227 |

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