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Note 9 - Segment Information (Tables)

6 Months Ended

Sep. 30, 2015

Notes Tables

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

		Three Months Ended September 30, 2015
		Biological Indicators				Instruments				Continuous Monitoring				Cold Chain				Total
Revenues		$	8,482			$	9,228			$	2,226			$	1,840			$	21,776
Gross profit		$	5,539			$	5,705			$	955			$	868			$	13,067
Selling expenses			507				1,210				508				63				2,288
		$	5,032			$	4,495			$	447			$	805				10,779
Reconciling items (1)																			(7,986	)
Earnings before income taxes																		$	2,793

		Three Months Ended September 30, 2014
		Biological Indicators				Instruments				Continuous Monitoring				Cold Chain				Total
Revenues		$	6,441			$	9,065			$	3,034			$	--			$	18,540
Gross profit		$	4,051			$	5,455			$	1,617			$	--			$	11,123
Selling expenses			368				829				145				--				1,342
		$	3,683			$	4,626			$	1,472			$	--				9,781
Reconciling items (1)																			(5,038	)
Earnings before income taxes																		$	4,743

		Six Months Ended September 30, 2015
		Biological Indicators				Instruments				Continuous Monitoring				Cold Chain				Total
Revenues		$	15,718			$	17,559			$	4,817			$	1,840			$	39,934
Gross profit		$	10,288			$	11,060			$	1,992			$	868			$	24,208
Selling expenses			867				2,191				966				63				4,087
		$	9,421			$	8,869			$	1,026			$	805				20,121
Reconciling items (1)																			(13,802	)
Earnings before income taxes																		$	6,319

		Six Months Ended September 30, 2014
		Biological Indicators				Instruments				Continuous Monitoring				Cold Chain				Total
Revenues		$	12,858			$	16,750			$	5,332			$	--			$	34,940
Gross profit		$	7,835			$	10,382			$	2,611			$	--			$	20,828
Selling expenses			772				1,821				812				--				3,405
		$	7,063			$	8,561			$	1,799			$	--				17,423
Reconciling items (1)																			(9,787	)
Earnings before income taxes																		$	7,636

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

		September 30, 2015				March 31, 201 5
Total assets
Biological Indicators		$	51,641			$	36,304
Instruments			44,952				44,401
Continuous Monitoring			30,339				31,558
Cold Chain			20,017				--
Corporate and administrative			8,944				5,057
		$	155,893			$	117,320

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

		Three M onths E nded September 30 ,								Six Months Ended September 30,
		201 5				2014				2015				2014
Net revenues from unaffiliated customers:
United States		$	12,529			$	9,698			$	24,723			$	18,189
Foreign			9,247				8,842				15,211				16,751
		$	21,776			$	18,540			$	39,934			$	34,940

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