XML 11 R1.htm IDEA: XBRL DOCUMENT v3.7.0.1
Document and Entity Information
 3 Months Ended
Aug. 31, 2017
shares
Document Information [Line Items]  
Document Type 10-Q
Amendment Flag false
Document Period End Date Aug. 31, 2017
Document Fiscal Year Focus 2018
Document Fiscal Period Focus Q1
Trading Symbol NEOG
Entity Registrant Name NEOGEN CORP
Entity Central Index Key 0000711377
Current Fiscal Year End Date --05-31
Entity Filer Category Large Accelerated Filer
Entity Common Stock, Shares Outstanding 38,233,260