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Description of Business and Basis of Presentation - Additional Information (Detail) - USD ($)		9 Months Ended	12 Months Ended
	Sep. 01, 2022	Feb. 28, 2023	May 31, 2022
Significant Accounting Policies [Line Items]
Right of use assets		$ 5,062,000	$ 3,184,000
Lease liabilities		$ 5,112,080	$ 3,228,000
Number Of Days Determined On Fair Value Of Assets And Liabilities From The Acquisition Date		12 months
Customer One
Significant Accounting Policies [Line Items]
Concentration Risk Receivables Single Customer Percentage		10.00%	10.00%
Minimum
Significant Accounting Policies [Line Items]
Useful Life in Years		5 years
Maximum
Significant Accounting Policies [Line Items]
Useful Life in Years		25 years
Three M Food Safety Transaction [Member]
Significant Accounting Policies [Line Items]
Number of shares issued in business acquisitions	108,269,946
Consideration for purchase of business	$ 3,200,000,000
Three M Food Safety Transaction [Member] | Premerger Neogen Shareholders [Member] | Postmerger Neogen Corp [Member]
Significant Accounting Policies [Line Items]
Minority interest ownership percentage by Parent	50.10%
Minority interest ownership percentage by Noncontrolling owners	49.90%

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