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Note 5 - Goodwill and Intangible Assets (Tables)

12 Months Ended

Mar. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill [Table Text Block]

		Biological Indicators				Instruments				Continuous Monitoring				Total
April 1, 2013		$	9,279			$	14,361			$	--			$	23,640
Acquisitions			--				579				13,647				14,226
March 31, 2014			9,279				14,940				13,647				37,866
Acquisitions			3,708				3,295				--				7,003
March 31, 2015		$	12,987			$	18,235			$	13,647			$	44,869

Schedule of Finite-Lived Intangible Assets [Table Text Block]

(In thousands)		March 31, 2015
		Carrying Amount				Accumulated Amortization				Net				Useful Life (Years)
Intellectual property		$	7,210			$	2,362			$	4,848				10-16
Trade names			3,158				863				2,295				3-10
Customer relationships			36,408				10,752				25,656				7-10
Non-compete agreements			1,286				854				432				3-10
		$	48,062			$	14,831			$	33,231

		March 31, 2014
		Carrying Amount				Accumulated Amortization				Net				Useful Life (Years)
Intellectual property		$	7,027			$	1,641			$	5,386				10-16
Trade names			2,648				519				2,129				3-10
Customer relationships			24,612				7,326				17,286				7-10
Non-compete agreements			1,286				670				616				3-10
		$	35,573			$	10,156			$	25,417

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

(In thousands)
2016		$	4,913
2017			4,773
2018			4,599
2019			4,271
2020			3,957

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Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

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Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

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-Paragraph 1

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Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

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-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267



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