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Fair Value (Details Textual) (USD $)	Nov. 30, 2012
Fair Value (Textual) [Abstract]
Potential amount of undiscounted future contingent consideration	$ 75,000,000
Milestones associated with the contingent consideration	52,400,000
Reflected in current portion of contingent consideration	$ 8,055,000

X

- Definition

Contingent consideration at remeasurement date.

+ References

No definition available.

+ Details

Name:	ango_ContingentConsiderationAtRemeasurementDate
Namespace Prefix:	ango_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

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

X

- Definition

Noncurrent portion contingent milestone payments fair value disclosure.

+ References

No definition available.

+ Details

Name:	ango_NoncurrentPortionContingentMilestonePaymentsFairValueDisclosure
Namespace Prefix:	ango_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Undiscounted contingent consideration fair value fair value disclosure.

+ References

No definition available.

+ Details

Name:	ango_UndiscountedContingentConsiderationFairValueFairValueDisclosure
Namespace Prefix:	ango_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant