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Note 10 - Segment Data - Operating Segment Asset Reconciliation (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019
Assets	$ 159,671	$ 156,767
Corporate, Non-Segment [Member]
Assets	18,688	17,857
Sterilzation and Disinfection Control [Member] | Operating Segments [Member]
Assets	76,258	74,230
Instruments [Member] | Operating Segments [Member]
Assets	32,456	30,911
Cold Chain Monitoring [Member] | Operating Segments [Member]
Assets	30,727	32,179
Cold Chain Packaging [Member] | Operating Segments [Member]
Assets	$ 1,542	$ 1,590

X

- 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

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