Note 5 - Goodwill and Intangible Assets - Change in the Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Mar. 31, 2017 |
Mar. 31, 2016 |
|
| Goodwill | $ 66,137 | $ 44,869 |
| Effect of foreign currency translation | (471) | (1,100) |
| Acquisitions | 6,490 | 22,368 |
| Goodwill | 72,156 | 66,137 |
| Biological Indicators [Member] | ||
| Goodwill | 20,898 | 12,987 |
| Effect of foreign currency translation | (97) | (624) |
| Acquisitions | 3,218 | 8,535 |
| Goodwill | 24,019 | 20,898 |
| Instruments [Member] | ||
| Goodwill | 18,235 | 18,235 |
| Effect of foreign currency translation | ||
| Acquisitions | ||
| Goodwill | 18,235 | 18,235 |
| Cold Chain Monitoring [Member] | ||
| Goodwill | 13,647 | 13,647 |
| Effect of foreign currency translation | ||
| Acquisitions | 1,757 | |
| Goodwill | 15,404 | 13,647 |
| Cold Chain Packaging [Member] | ||
| Goodwill | 13,357 | |
| Effect of foreign currency translation | (374) | (476) |
| Acquisitions | 1,515 | 13,833 |
| Goodwill | $ 14,498 | $ 13,357 |