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Document and Entity Information
 9 Months Ended
Jan. 31, 2013
Mar. 07, 2013
Document and Entity Information [Abstract]    
Entity Registrant Name KEWAUNEE SCIENTIFIC CORP /DE/  
Entity Central Index Key 0000055529  
Document Type 10-Q  
Document Period End Date Jan. 31, 2013  
Amendment Flag false  
Document Fiscal Year Focus 2013  
Document Fiscal Period Focus Q3  
Current Fiscal Year End Date --04-30  
Entity Filer Category Smaller Reporting Company  
Entity Common Stock, Shares Outstanding   2,591,462