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Note 5 - Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Mar. 31, 2017
Notes Tables |
Schedule of Goodwill [Table Text Block] |
|  | Biological Indicators |  |  | Instruments |  |  | Cold Chain Monitoring |  |  | Cold Chain Packaging |  |  | Total |
March 31, 2015 |  | $ | 12,987 |  |  | $ | 18,235 |  |  | $ | 13,647 |  |  | $ | -- |  |  | $ | 44,869 |
Effect of foreign currency translation |  |  | (624 | ) |  |  | -- |  |  |  | -- |  |  |  | (476 | ) |  |  | (1,100 | )
Acquisitions |  |  | 8,535 |  |  |  | -- |  |  |  | -- |  |  |  | 13,833 |  |  |  | 22,368 |
March 31, 2016 |  |  | 20,898 |  |  |  | 18,235 |  |  |  | 13,647 |  |  |  | 13,357 |  |  |  | 66,137 |
Effect of foreign currency translation |  |  | (97 | ) |  |  | -- |  |  |  | -- |  |  |  | (374 | ) |  |  | (471 | )
Acquisitions |  |  | 3,218 |  |  |  | -- |  |  |  | 1,757 |  |  |  | 1,515 |  |  |  | 6,490 |
March 31, 2017 |  | $ | 24,019 |  |  | $ | 18,235 |  |  | $ | 15,404 |  |  | $ | 14,498 |  |  | $ | 72,156 |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
(In thousands) |  | March 31, 201 7 |
|  | Carrying Amount |  |  | Accumulated Amortization |  |  | Net |  |  | Useful Life (Years) |
Intellectual property |  | $ | 7,210 |  |  | $ | (3,824 | ) |  | $ | 3,386 |  |  | 10 | - | 16 |
Trade names |  |  | 3,663 |  |  |  | (1,727 | ) |  |  | 1,936 |  |  | 3 | - | 10 |
Customer relationships |  |  | 52,134 |  |  |  | (20,260 | ) |  |  | 31,874 |  |  | 7 | - | 10 |
Non-compete agreements |  |  | 1,845 |  |  |  | (1,251 | ) |  |  | 594 |  |  | 3 | - | 10 |
|  | $ | 64,852 |  |  | $ | (27,062 | ) |  | $ | 37,790 |  |  |  |  |  |
|  | March 31, 201 6 |
|  | Carrying Amount |  |  | Accumulated Amortization |  |  | Net |  |  | Useful Life (Years) |
Intellectual property |  | $ | 7,364 |  |  | $ | (3,093 | ) |  | $ | 4,271 |  |  | 10 | - | 16 |
Trade names |  |  | 3,474 |  |  |  | (1,271 | ) |  |  | 2,203 |  |  | 3 | - | 10 |
Customer relationships |  |  | 48,782 |  |  |  | (15,228 | ) |  |  | 33,554 |  |  | 7 | - | 10 |
Non-compete agreements |  |  | 1,846 |  |  |  | (1,077 | ) |  |  | 769 |  |  | 3 | - | 10 |
|  | $ | 61,466 |  |  | $ | (20,669 | ) |  | $ | 40,797 |  |  |  |  |  |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
(In thousands) |  |  |  |
2018 |  | $ | 6,349 |
2019 |  |  | 6,021 |
2020 |  |  | 5,689 |
2021 |  |  | 4,644 |
2022 |  |  | 4,278 |

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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://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -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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