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Organization and Significant Accounting Policies - Government Contracts (Details) - USD ($)
$ in Thousands
3 Months Ended
Jul. 31, 2021
Aug. 01, 2020
Numerator for basic earnings per share:    
Net income attributable to AeroVironment, Inc. $ (13,981) $ 10,080
Denominator for basic earnings per share:    
Weighted average common shares 24,620,180 23,893,001
Dilutive effect of employee stock options, restricted stock and restricted stock units   293,227
Denominator for diluted earnings (loss) per share 24,620,180 24,186,228
Number of shares reserved for issuance 0  
Number of anti-dilutive shares 3,871 844
Number of anti-dilutive due to loss 276,107