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Organization and Significant Accounting Policies - Research and Development (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Apr. 30, 2023 | Apr. 30, 2022 | Apr. 30, 2021
Stock-Based Compensation |  |  |
Performance period | 3 years |  |
Research and Development |  |  |
Revenue from customer funded research and development | $ 97,880 | $ 84,247 | $ 74,218
Cost of sales | 70,711 | 59,054 | 51,395
Research and Development With Federal Government |  |  |
Funding | 11,225 |  |
Reimbursement amount | $ 21,833 |  |
Reimbursements under the contract |  |  | 3,424
Lease Accounting |  |  |
Option to extend | true |  |
Option to terminate | true |  |
Option to terminate period (in years) | 3 years |  |
Advertising Costs |  |  |
Advertising expenses | $ 494 | 451 | 675
Foreign currency transactions |  |  |
Foreign currency losses | 119 | 242 | 1
Numerator for basic earnings per share: |  |  |
Net (loss) income attributable to AeroVironment, Inc. | $ (176,212) | $ (4,188) | $ 23,331
Denominator for basic (loss) earnings per share: |  |  |
Weighted average common shares | 25,044,881 | 24,685,534 | 24,049,851
Dilutive effect of employee stock options, restricted stock and restricted stock units |  |  | 312,805
Denominator for diluted (loss) earbubgs per share | 25,044,881 | 24,685,534 | 24,362,656
Number of anti-dilutive shares | 146,000 | 224,000 | 3,000
Number of anti-dilutive due to loss | 0 | 0 |
Prepaid expenses and other current assets |  |  |
Cost to Fulfill a Contract with a Customer |  |  |
Costs to fulfill future performance obligations | $ 0 | $ 0 |
Minimum |  |  |
Lease Accounting |  |  |
Remaining lease terms (in years) | 1 year |  |
Maximum |  |  |
Lease Accounting |  |  |
Remaining lease terms (in years) | 7 years |  |
Option to extend period (in years) | 9 years |  |

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