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v3.20.4

Revenue Recognition- Additional Information (Detail) | 6 Months Ended
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Nov. 30, 2020
Products and Services, Payment Terms | 30 to 60 days

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- 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