Document and Entity Information - shares
9 Months Ended
Jan. 26, 2019
Feb. 26, 2019
Document and Entity Information    
Entity Registrant Name AeroVironment Inc  
Entity Central Index Key 0001368622  
Document Type 10-Q  
Document Period End Date Jan. 26, 2019  
Amendment Flag false  
Current Fiscal Year End Date --04-30  
Entity Current Reporting Status Yes  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   23,932,381
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Entity Emerging Growth Company false  
Entity Small Business false