v2.3.0.11
Document And Entity Information
3 Months Ended
Aug. 31, 2011
Sep. 01, 2011
Document And Entity Information    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Aug. 31, 2011
Document Fiscal Year Focus 2012  
Document Fiscal Period Focus Q1  
Entity Filer Category Large Accelerated Filer  
Entity Registrant Name NEOGEN CORP  
Entity Central Index Key 0000711377  
Current Fiscal Year End Date --05-31  
Entity Common Stock, Shares Outstanding   23,374,000