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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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May 31, 2020
Goodwill by Business Segment | The following table summarizes goodwill by reportable segment:
(in thousands) |  | Food Safety |  |  | Animal Safety |  |  | Total |
Balance, May 31, 2018 |  | $ | 40,001 |  |  | $ | 59,557 |  |  | $ | 99,558 |
Goodwill acquired |  |  | 3,796 |  |  |  | 1,196 |  |  |  | 4,992 |
Goodwill and/or currency adjustments (1) |  |  | (1,244 | ) |  |  | 313 |  |  |  | (931 | )
Balance, May 31, 2019 |  | $ | 42,553 |  |  | $ | 61,066 |  |  | $ | 103,619 |
Goodwill acquired |  |  | 6,254 |  |  |  | 2,095 |  |  |  | 8,349 |
Goodwill and/or currency adjustments (1) |  |  | (1,592 | ) |  |  | (36 | ) |  |  | (1,628 | )
Balance, May 31, 2020 |  | $ | 47,215 |  |  | $ | 63,125 |  |  | $ | 110,340 |
(1) | Includes final purchase price allocation adjustments and currency adjustments for goodwill recorded at international locations.
Amortizable of Intangible Assets | Amortizable intangible assets consisted of the following and are included in customer-based intangibles and other non-current assets within the consolidated balance sheets:
(in thousands) |  | Gross Carrying Amount |  |  | Less Accumulated Amortization |  |  | Net Carrying Amount |
Licenses |  | $ | 10,346 |  |  | $ | 3,330 |  |  | $ | 7,016 |
Covenants not to compete |  |  | 706 |  |  |  | 407 |  |  |  | 299 |
Patents |  |  | 8,509 |  |  |  | 4,118 |  |  |  | 4,391 |
Customer-based intangibles |  |  | 59,847 |  |  |  | 29,898 |  |  |  | 29,949 |
Other products and service-related intangibles |  |  | 16,646 |  |  |  | 6,937 |  |  |  | 9,709 |
Balance, May 31, 2020 |  | $ | 96,054 |  |  | $ | 44,690 |  |  | $ | 51,364 |
Licenses |  | $ | 9,813 |  |  | $ | 3,182 |  |  | $ | 6,631 |
Covenants not to compete |  |  | 862 |  |  |  | 542 |  |  |  | 320 |
Patents |  |  | 8,158 |  |  |  | 3,570 |  |  |  | 4,588 |
Customer-based intangibles |  |  | 57,634 |  |  |  | 28,017 |  |  |  | 29,617 |
Other products and service-related intangibles |  |  | 16,464 |  |  |  | 5,524 |  |  |  | 10,940 |
Balance, May 31, 2019 |  | $ | 92,931 |  |  | $ | 40,835 |  |  | $ | 52,096 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13854-109267 + Details
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