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Note 5 - Goodwill and Intangible Assets, Net - Change in the Carrying Amount of Goodwill (Details) $ in Thousands	3 Months Ended
	Jun. 30, 2020 USD ($)
Goodwill	$ 141,536
Effect of foreign currency translation	5,869
Acquisitions	0
Goodwill adjustment related to GPT acquisition	6,543
Goodwill	153,948
Corporate, Non-Segment [Member]
Goodwill	0
Effect of foreign currency translation	0
Acquisitions	0
Goodwill adjustment related to GPT acquisition
Goodwill	0
Sterilzation and Disinfection Control [Member] | Operating Segments [Member]
Goodwill	29,594
Effect of foreign currency translation	173
Acquisitions	0
Goodwill adjustment related to GPT acquisition
Goodwill	29,767
Instruments [Member] | Operating Segments [Member]
Goodwill	19,123
Effect of foreign currency translation	20
Acquisitions	0
Goodwill adjustment related to GPT acquisition
Goodwill	19,143
Biopharmaceutical Development [Member] | Operating Segments [Member]
Goodwill	74,716
Effect of foreign currency translation	5,676
Acquisitions	0
Goodwill adjustment related to GPT acquisition	6,543
Goodwill	86,935
Continuous Monitoring [Member] | Operating Segments [Member]
Goodwill	18,103
Effect of foreign currency translation	0
Acquisitions	0
Goodwill adjustment related to GPT acquisition
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
-Paragraph 1
-Subparagraph (SX 210.9-03(10)(1))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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-Topic 350
-SubTopic 20
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-Paragraph 1
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- Definition

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+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
-Paragraph 1
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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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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=116868678&loc=d3e961-128460

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