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Note 12 - Segment Information - Operating Segment Asset Reconciliation (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Mar. 31, 2019
--- | --- | ---
Assets |  | $ 423,467 | $ 156,767
Corporate, Non-Segment [Member] |  |  |
Assets |  | 87,168 | 17,857
Sterilzation and Disinfection Control [Member] | Operating Segments [Member] |  |  |
Assets |  | 76,493 | 74,230
Instruments [Member] | Operating Segments [Member] |  |  |
Assets |  | 32,286 | 30,911
Biopharmaceutical Development [Member] | Operating Segments [Member] |  |  |
Assets |  | 196,366 |
Cold Chain Monitoring [Member] | Operating Segments [Member] |  |  |
Assets |  | 31,022 | 32,179
Cold Chain Packaging [Member] | Operating Segments [Member] |  |  |
Assets | [1] | $ 132 | $ 1,590
[1] | Represents net receivables from Cold Chain Packaging customers. The majority of Cold Chain Packaging's receivables are expected to be collected during the three months ending March 31, 2020.

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(11)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(12)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 + Details
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