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Note 8 - Segment Information (Tables)

3 Months Ended

Jun. 30, 2014

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

		Three Months Ended June 30, 2014
		Biological Indicators				Instruments				Continuous Monitoring				Total
Revenues		$	6,417			$	7,685			$	2,298			$	16,400
Gross profit		$	3,784			$	4,927			$	994			$	9,705
Selling expenses			404				992				667				2,063
		$	3,380			$	3,935			$	327				7,642
Reconciling items (1)															(4,749	)
Earnings before income taxes														$	2,893

		Three Months Ended June 30, 2013
		Biological Indicators				Instruments				Continuous Monitoring				Total
Revenues		$	4,854			$	6,364				--			$	11,218
Gross profit		$	2,561			$	4,236				--			$	6,797
Selling expenses			390				693				--				1,083
		$	2,171			$	3,543				--				5,714
Reconciling items (1)															(2,699	)
Earnings before income taxes														$	3,015

Reconciliation of Assets from Segment to Consolidated [Table Text Block]

		June 30, 2014				March 31, 2014
Total assets
Biological Indicators		$	26,458			$	22,771
Instruments			47,643				36,797
Continuous Monitoring			28,803				28,578
Corporate and administrative			7,380				9,383
		$	110,284			$	97,529

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]

		Three Months Ended
		June 30,
		2014				2013
Net revenues from unaffiliated customers:
United States		$	8,491			$	6,030
Foreign			7,909				5,188
		$	16,400			$	11,218

X

- Definition

Tabular disclosure of all significant reconciling items in the reconciliation of total assets from reportable segments to the entity's consolidated assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 280

-SubTopic 10

-Section 50

-Paragraph 31

-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8924-108599



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 280

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-Section 50

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-Subparagraph (c)

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+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

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-Article 5



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- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 280

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (b)

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