Note 15 - Segment Data - Operating Segment Asset Reconciliation (Details) - USD ($) $ in Thousands |
Mar. 31, 2017 |
Mar. 31, 2016 |
|---|---|---|
| Assets | $ 171,733 | $ 160,748 |
| Corporate, Non-Segment [Member] | ||
| Assets | 7,593 | 7,856 |
| Biological Indicators [Member] | Operating Segments [Member] | ||
| Assets | 67,233 | 56,724 |
| Instruments [Member] | Operating Segments [Member] | ||
| Assets | 40,805 | 49,077 |
| Cold Chain Monitoring [Member] | Operating Segments [Member] | ||
| Assets | 35,789 | 27,613 |
| Cold Chain Packaging [Member] | Operating Segments [Member] | ||
| Assets | $ 20,313 | $ 19,478 |