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Organization and Significant Accounting Policies - Research and Development (Details) - USD ($)
$ in Thousands
12 Months Ended
Apr. 30, 2022
Apr. 30, 2021
Apr. 30, 2020
Stock-Based Compensation      
Performance period 3 years    
Research and Development      
Revenue from customer funded research and development $ 84,247 $ 74,218 $ 80,934
Cost of sales 59,054 51,395 56,440
Research and Development With Federal Government      
Funding 11,225    
Reimbursement amount 21,833    
Reimbursements under the contract $ 3,424 8,102  
Lease Accounting      
Option to terminate period (in years) 2 years    
Advertising Costs      
Advertising expenses $ 451 675 934
Foreign currency transactions      
Foreign currency losses 242 1 1
Numerator for basic earnings per share:      
Continuing operations attributable to AeroVironment (4,188) 23,331 41,339
Loss on sale of business, net of tax     (265)
Net income attributable to AeroVironment $ (4,188) $ 23,331 $ 41,074
Denominator for basic earnings per share:      
Weighted average common shares 24,685,534 24,049,851 23,806,208
Dilutive effect of employee stock options, restricted stock and restricted stock units   312,805 281,959
Denominator for diluted earnings (loss) per share 24,685,534 24,362,656 24,088,167
Number of shares reserved for issuance 0    
Number of anti-dilutive shares 224,000 3,000 3,000
Prepaid expenses and other current assets      
Cost to Fulfill a Contract with a Customer      
Costs to fulfill future performance obligations $ 0 $ 1,729  
Maximum      
Lease Accounting      
Option to extend period (in years) 10 years