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Note 14 - Segment Data (Tables)

12 Months Ended

Mar. 31, 2016

Notes Tables

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

		Year Ended March 31, 201 6
		Biological Indicators				Instruments				Continuous Monitoring				Cold Chain				Total
Revenues		$	33,649			$	35,692			$	10,792			$	4,526			$	84,659
Gross profit		$	22,205			$	23,223			$	4,154			$	1,831			$	51,413
Selling expenses			1,734				3,848				1,642				276				7,500
		$	20,471			$	19,375			$	2,512			$	1,555				43,913
Reconciling items (1)																			(28,358	)
Earnings before income taxes																		$	15,555

		Year Ended March 31, 201 5
		Biological Indicators				Instruments				Continuous Monitoring				Cold Chain				Total
Revenues		$	27,390			$	33,054			$	10,886			$	--			$	71,330
Gross profit		$	17,142			$	20,763			$	5,487			$	--			$	43,392
Selling expenses			1,551				3,441				2,184				--				7,176
		$	15,591			$	17,322			$	3,303			$	--				36,216
Reconciling items (1)																			(20,869	)
Earnings before income taxes																		$	15,347

		Year Ended March 31, 2014
		Biological Indicators				Instruments				Continuous Monitoring				Cold Chain				Total
Revenues		$	22,992			$	26,389			$	3,343			$	--			$	52,724
Gross profit		$	13,187			$	16,904			$	1,597			$	--			$	31,688
Selling expenses			1,350				3,954				815				--				6,119
		$	11,837			$	12,950			$	782			$	--				25,569
Reconciling items (1)																			(12,466	)
Earnings before income taxes																		$	13,103

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

		Year Ended March 31,
		201 6				201 5				201 4
Revenues from unaffiliated customers
United States		$	53,094			$	45,798			$	29,551
Foreign			31,565				25,532				23,173
		$	84,659			$	71,330			$	52,724

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

		March 31,
		2016				2015
Total assets
Biological Indicators		$	56,724			$	36,304
Instruments			49,077				44,401
Continuous Monitoring			26,881				31,558
Cold Chain			20,210				--
Corporate and administrative			7,856				5,057
		$	160,748			$	117,320

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