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Fair Value - Fair Value Measurements Using Significant Unobservable Inputs (Detail) $ in Thousands	6 Months Ended
	Nov. 30, 2015 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Change in Fair Value of Contingent Consideration	$ 661
Financial assets, begining balance	1,689
Financial liabilities, begining balance	47,384
Currency translation adjustment, assets	0
Currency translation adjustment, liabilities	(96)
Included in other comprehensive income, assets	25
Included in other comprehensive income, liabilities	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements)	(25)
Contingent consideration - Clinical Devices, assets	0
Financial assets, ending balance	1,639
Financial liabilities, ending balance	37,849
Clinical Devices B.V [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration - Clinical Devices, liabilities	$ (10,100)

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The expense charged against earnings in the period resulting from remeasurement to fair value of contingent earn out liabilities related to acquisitions.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of gain (loss) recognized in other comprehensive income (loss) for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
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Amount of purchases, (sales), issuances and (settlements) of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of gain (loss) recognized in other comprehensive income (loss) for financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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