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Note 15 - Segment Data - Operating Segment Asset Reconciliation (Details) - USD ($) $ in Thousands | Mar. 31, 2017 | Mar. 31, 2016
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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

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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://www.xbrl.org/2003/role/presentationRef -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=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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