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Note 8 - Goodwill and Long-lived Assets (Tables) | 12 Months Ended
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Mar. 31, 2020
Notes Tables |
Schedule of Goodwill [Table Text Block] |
|  | Sterilization and Disinfection Control |  |  | Instruments |  |  | Biopharmaceutical Development |  |  | Continuous Monitoring |  |  | Corporate and Other |  |  | Total |
March 31, 2018 |  | $ | 30,503 |  |  | $ | 18,235 |  |  | $ | -- |  |  | $ | 15,404 |  |  | $ | 1,401 |  |  | $ | 65,543 |
Effect of foreign currency translation |  |  | (723 | ) |  |  | -- |  |  |  | -- |  |  |  | -- |  |  |  | (67 | ) |  |  | (790 | )
Acquisitions |  |  | -- |  |  |  | -- |  |  |  | -- |  |  |  | 2,699 |  |  |  | -- |  |  |  | 2,699 |
Impairment |  |  | -- |  |  |  | -- |  |  |  | -- |  |  |  | -- |  |  |  | (1,075 | ) |  |  | (1,075 | )
March 31, 2019 |  |  | 29,780 |  |  |  | 18,235 |  |  |  | -- |  |  |  | 18,103 |  |  |  | 259 |  |  |  | 66,377 |
Effect of foreign currency translation |  |  | (186 | ) |  |  | (20 | ) |  |  | (2,447 | ) |  |  | -- |  |  |  | (1 | ) |  |  | (2,654 | )
Acquisitions |  |  | -- |  |  |  | 908 |  |  |  | 77,162 |  |  |  | -- |  |  |  | -- |  |  |  | 78,070 |
Impairment |  |  | -- |  |  |  | -- |  |  |  | -- |  |  |  | -- |  |  |  | (258 | ) |  |  | (258 | )
March 31, 2020 |  | $ | 29,594 |  |  | $ | 19,123 |  |  | $ | 74,716 |  |  | $ | 18,103 |  |  | $ | -- |  |  | $ | 141,536 |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | March 31, 2020 |  |  | March 31, 2019 |
|  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |
Intellectual property |  | $ | 15,731 |  |  | $ | (6,454 | ) |  | $ | 9,277 |  |  | $ | 7,690 |  |  | $ | (5,301 | ) |  | $ | 2,389 |
Trade names |  |  | 5,839 |  |  |  | (2,855 | ) |  |  | 2,984 |  |  |  | 3,739 |  |  |  | (2,542 | ) |  |  | 1,197 |
Customer relationships |  |  | 146,106 |  |  |  | (38,777 | ) |  |  | 107,329 |  |  |  | 61,198 |  |  |  | (31,584 | ) |  |  | 29,614 |
Non-compete agreements |  |  | 1,447 |  |  |  | (1,166 | ) |  |  | 281 |  |  |  | 1,581 |  |  |  | (1,562 | ) |  |  | 19 |
Total |  | $ | 169,123 |  |  | $ | (49,252 | ) |  | $ | 119,871 |  |  | $ | 74,208 |  |  | $ | (40,989 | ) |  | $ | 33,219 |
Description |  | Estimated Useful Life (Years) |  |  | Weighted Average Remaining Life (Years) |
Intellectual Property |  |  | 10 - 15 |  |  |  | 9.5 |
Trade Name |  |  | 5 - 10 |  |  |  | 4.4 |
Customer Relationships |  |  | 5 - 10 |  |  |  | 9.5 |
Non-compete Agreements |  |  | 5 - 10 |  |  |  | 4.4 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
2021 |  | $ | 14,813 |
2022 |  |  | 14,448 |
2023 |  |  | 14,240 |
2024 |  |  | 13,724 |
2025 |  |  | 12,129 |

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