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Note 16 - Segment Data - Segment Inventory (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Mar. 31, 2020
--- | --- | ---
Total inventories | $ 11,178 | $ 14,230
Operating Segments [Member] |  |
Total inventories | 11,178 | 14,230
Operating Segments [Member] | Sterilization and Disinfection Control [Member] |  |
Total inventories | 2,333 | 2,104
Operating Segments [Member] | Instruments [Member] |  |
Total inventories | 3,253 | 3,065
Operating Segments [Member] | Biopharmaceutical Development [Member] |  |
Total inventories | 4,162 | 7,438
Operating Segments [Member] | Cold Chain Monitoring [Member] |  |
Total inventories | 1,430 | 1,623
Corporate, Non-Segment [Member] |  |
Total inventories | $ 0 | $ 0

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