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Note 5 - Goodwill and Intangible Assets - Change in the Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Goodwill	$ 65,543	$ 72,156
Effect of foreign currency translation	(790)	1,258
Acquisitions	2,699	5,948
Impairment	(1,075)	(13,819)
Goodwill	66,377	65,543
Sterilzation and Disinfection Control [Member]
Goodwill	30,503	24,019
Effect of foreign currency translation	(723)	536
Acquisitions		5,948
Impairment
Goodwill	29,780	30,503
Instruments [Member]
Goodwill	18,235	18,235
Effect of foreign currency translation
Acquisitions
Impairment
Goodwill	18,235	18,235
Cold Chain Monitoring [Member]
Goodwill	15,404	15,404
Effect of foreign currency translation
Acquisitions	2,699
Impairment
Goodwill	18,103	15,404
Cold Chain Packaging [Member]
Goodwill	1,401	14,498
Effect of foreign currency translation	(67)	722
Acquisitions
Impairment	(1,075)	(13,819)
Goodwill	$ 259	$ 1,401

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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