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Note 13 - Segment Information - Operating Segment Asset Reconciliation (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Mar. 31, 2020
--- | --- | ---
Assets | $ 588,932 | $ 420,206
Corporate, Non-Segment [Member] |  |
Assets | 267,431 | 103,588
Sterilization and Disinfection Control [Member] | Operating Segments [Member] |  |
Assets | 68,571 | 73,103
Instruments [Member] | Operating Segments [Member] |  |
Assets | 29,735 | 31,025
Biopharmaceutical Development [Member] | Operating Segments [Member] |  |
Assets | 194,570 | 182,758
Continuous Monitoring [Member] | Operating Segments [Member] |  |
Assets | $ 28,625 | $ 29,732

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