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Recently Issued Accounting Pronouncements (Details)	6 Months Ended
	Nov. 30, 2012
Recently Issued Accounting Pronouncements (Textual) [Abstract]
Indefinite-lived intangible asset impairment threshold	More than 50%

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- Definition

The more-likely than not indefinite-lived intangible asset impairment threshold.

+ References

No definition available.

+ Details

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Namespace Prefix:	ango_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Details

Name:	ango_RecentlyIssuedAccountingPronouncementsTextualAbstract
Namespace Prefix:	ango_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration