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Revenue Recognition- Additional Information (Detail)	9 Months Ended
	Feb. 28, 2021
Products and Services, Payment Terms	30 to 60 days

X

- Definition

Products and Services, Payment Terms

+ References

No definition available.

+ Details

Name:	neog_ProductsAndServicesPaymentTerms
Namespace Prefix:	neog_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration