Document and Entity Information - USD ($)
$ in Millions
12 Months Ended
Apr. 30, 2017
Jun. 20, 2017
Oct. 29, 2016
Document and Entity Information      
Entity Registrant Name AeroVironment Inc    
Entity Central Index Key 0001368622    
Document Type 10-K    
Document Period End Date Apr. 30, 2017    
Amendment Flag false    
Current Fiscal Year End Date --04-30    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Accelerated Filer    
Entity Public Float     $ 504.9
Entity Common Stock, Shares Outstanding   23,729,911  
Document Fiscal Year Focus 2017    
Document Fiscal Period Focus FY