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Note 10 - Segment Information (Tables)

6 Months Ended

Sep. 30, 2018

Notes Tables

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

		Three Months Ended September 30, 2018
		Sterilization and Disinfection Control				Instruments				Cold Chain Monitoring				Cold Chain Packaging				Total
Revenues		$	11,582			$	8,704			$	2,950			$	1,629			$	24,865
Gross profit		$	7,972			$	5,354			$	1,164			$	87			$	14,577
Reconciling items (1)																			(13,271	)
Earnings before income taxes																		$	1,306

		Three Months Ended September 30, 2017
		Sterilization and Disinfection Control				Instruments				Cold Chain Monitoring				Cold Chain Packaging				Total
Revenues		$	9,985			$	7,983			$	3,151			$	1,835			$	22,954
Gross profit		$	6,822			$	4,963			$	1,193			$	255			$	13,233
Reconciling items (1)																			(10,127	)
Earnings before income taxes																		$	3,106

		Six Months Ended September 30, 2018
		Sterilization and Disinfection Control				Instruments				Cold Chain Monitoring				Cold Chain Packaging				Total
Revenues		$	22,930			$	17,435			$	6,173			$	3,469			$	50,007
Gross profit		$	15,784			$	10,987			$	2,628			$	269			$	29,668
Reconciling items (1)																			(23,962	)
Earnings before income taxes																		$	5,706

		Six Months Ended September 30, 2017
		Sterilization and Disinfection Control				Instruments				Cold Chain Monitoring				Cold Chain Packaging				Total
Revenues		$	20,168			$	16,586			$	6,068			$	2,805			$	45,627
Gross profit		$	13,542			$	9,871			$	2,087			$	404			$	25,904
Reconciling items (1)																			(21,495	)
Earnings before income taxes																		$	4,409

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

		September 30, 2018				March 31, 2018
Total assets
Sterilization and Disinfection Control		$	77,817			$	83,452
Instruments			30,616				33,479
Cold Chain Monitoring			29,957				30,796
Cold Chain Packaging			6,993				7,091
Corporate and administrative			14,905				9,283
Total		$	160,288			$	164,101

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

		Three Months Ended September 30,								Six Months Ended September 30,
		2018				2017				2018				2017
United States		$	16,617			$	14,432			$	32,165			$	27,443
Foreign			8,248				8,522				17,842				18,184
Total		$	24,865			$	22,954			$	50,007			$	45,627

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