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Note 5 - Goodwill and Intangible Assets (Tables)

12 Months Ended

Mar. 31, 2017

Notes Tables

Schedule of Goodwill [Table Text Block]

		Biological Indicators				Instruments				Cold Chain Monitoring				Cold Chain Packaging				Total
March 31, 2015		$	12,987			$	18,235			$	13,647			$	--			$	44,869
Effect of foreign currency translation			(624	)			--				--				(476	)			(1,100	)
Acquisitions			8,535				--				--				13,833				22,368
March 31, 2016			20,898				18,235				13,647				13,357				66,137
Effect of foreign currency translation			(97	)			--				--				(374	)			(471	)
Acquisitions			3,218				--				1,757				1,515				6,490
March 31, 2017		$	24,019			$	18,235			$	15,404			$	14,498			$	72,156

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

(In thousands)		March 31, 201 7
		Carrying Amount				Accumulated Amortization				Net				Useful Life (Years)
Intellectual property		$	7,210			$	(3,824	)		$	3,386			10	-	16
Trade names			3,663				(1,727	)			1,936			3	-	10
Customer relationships			52,134				(20,260	)			31,874			7	-	10
Non-compete agreements			1,845				(1,251	)			594			3	-	10
		$	64,852			$	(27,062	)		$	37,790

		March 31, 201 6
		Carrying Amount				Accumulated Amortization				Net				Useful Life (Years)
Intellectual property		$	7,364			$	(3,093	)		$	4,271			10	-	16
Trade names			3,474				(1,271	)			2,203			3	-	10
Customer relationships			48,782				(15,228	)			33,554			7	-	10
Non-compete agreements			1,846				(1,077	)			769			3	-	10
		$	61,466			$	(20,669	)		$	40,797

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

(In thousands)
2018		$	6,349
2019			6,021
2020			5,689
2021			4,644
2022			4,278