v3.25.3

Document And Entity Information	Aug. 14, 2025
Cover [Abstract]
Document Type	8-K/A
Amendment Flag	true
Document Period End Date	Aug. 14, 2025
Entity Registrant Name	Neogen Corporation
Entity Central Index Key	0000711377
Entity Emerging Growth Company	false
Entity File Number	0-17988
Entity Incorporation, State or Country Code	MI
Entity Tax Identification Number	38-2367843
Entity Address, Address Line One	620 Lesher Place
Entity Address, City or Town	Lansing
Entity Address, State or Province	MI
Entity Address, Postal Zip Code	48912
City Area Code	(517)
Local Phone Number	372-9200
Entity Information, Former Legal or Registered Name	N/A
Written Communications	false
Soliciting Material	false
Pre-commencement Tender Offer	false
Pre-commencement Issuer Tender Offer	false
Title of 12(b) Security	Common Stock, $0.16 par value per share
Trading Symbol	NEOG
Security Exchange Name	NASDAQ
Amendment Description	This Form 8-K/A amends the Form 8-K filed on August 14, 2025 to include the newly appointed director's committee appointments, which were determined subsequent to the original filing.

Description of changes contained within amended document.

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For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.

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NEOGEN CORP 8-K/A