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Note 5 - Goodwill and Intangible Assets, Net - Change in the Carrying Amount of Goodwill (Details) $ in Thousands	6 Months Ended
	Sep. 30, 2021 USD ($)
Goodwill	$ 160,841
Effect of foreign currency translation	(864)
Goodwill	159,977
Sterilization and Disinfection Control [Member] | Operating Segments [Member]
Goodwill	30,153
Effect of foreign currency translation	(100)
Goodwill	30,053
Biopharmaceutical Development [Member] | Operating Segments [Member]
Goodwill	93,399
Effect of foreign currency translation	(752)
Goodwill	92,647
Instruments [Member] | Operating Segments [Member]
Goodwill	19,186
Effect of foreign currency translation	(12)
Goodwill	19,174
Continuous Monitoring [Member] | Operating Segments [Member]
Goodwill	18,103
Effect of foreign currency translation	0
Goodwill	$ 18,103

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
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X

- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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