XML 13 R1.htm IDEA: XBRL DOCUMENT v3.8.0.1
Document and Entity Information - shares
9 Months Ended
Jan. 31, 2018
Mar. 05, 2018
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jan. 31, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q3  
Trading Symbol KEQU  
Entity Registrant Name KEWAUNEE SCIENTIFIC CORP /DE/  
Entity Central Index Key 0000055529  
Current Fiscal Year End Date --04-30  
Entity Filer Category Smaller Reporting Company  
Entity Common Stock, Shares Outstanding   2,724,932