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Note 9 - Segment Information (Details) - Operating Segment Asset Reconciliation - USD ($) $ in Thousands	Jun. 30, 2015	Mar. 31, 2015
Total assets
Total assets	$ 117,189	$ 117,320
Biological Indicators [Member]
Total assets
Total assets	37,384	36,304
Instruments [Member]
Total assets
Total assets	43,636	44,401
Continuous Monitoring [Member]
Total assets
Total assets	30,931	31,558
Corporate Segment [Member]
Total assets
Total assets	$ 5,238	$ 5,057

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- References

No definition available.

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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 210



-SubTopic 10



-Section S99



-Paragraph 1



-Subparagraph (SX 210.5-02.18)



-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



-SubTopic 10



-Section S99



-Paragraph 1



-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 3: http://www.xbrl.org/2003/role/presentationRef



-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Section 03



-Paragraph 12



-Article 7

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