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Fair Value - Fair Value Measurements Using Significant Unobservable Inputs (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Feb. 28, 2021	Feb. 28, 2021
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Financial liabilities, beginning balance	$ 15,178	$ 15,647
Change in present value of contingent consideration	183	(290)
Currency gain from remeasurement	1	5
Financial liabilities, ending balance	$ 15,362	$ 15,362

X

- Definition

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

+ References

No definition available.

+ Details

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Namespace Prefix:	ango_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Currency Gain (Loss) From Remeasurement

+ References

No definition available.

+ Details

Name:	ango_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityCurrencyGainLossFromRemeasurement
Namespace Prefix:	ango_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

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