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Organization and Significant Accounting Policies - Government Contracts (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jan. 25, 2020 | Jan. 26, 2019 | Jan. 25, 2020 | Jan. 26, 2019 | Apr. 30, 2019
Government Contracts |  |  |  |  |
Reserves for incurred cost claim audits | $ 275,000 |  | $ 275,000 |  | $ 93,000
Numerator for basic earnings per share: |  |  |  |  |
Continuing operations attributable to AeroVironment | (1,008,000) | $ 8,431,000 | 23,603,000 | $ 35,815,000 |
Discontinued operations, net of tax |  | (62,000) |  | 5,941,000 |
Net (loss) income attributable to AeroVironment | $ (1,008,000) | $ 8,369,000 | $ 23,603,000 | $ 41,756,000 |
Denominator for basic (loss) earnings per share: |  |  |  |  |
Weighted average common shares | 23,821,145 | 23,687,672 | 23,790,788 | 23,643,866 |
Dilutive effect of employee stock options, restricted stock and restricted stock units |  | 394,147 | 285,407 | 420,142 |
Denominator for diluted (loss) earnings per share | 23,821,145 | 24,081,819 | 24,076,195 | 24,064,008 |
Number of shares reserved for issuance | 0 |  | 0 |  |
Number of anti-dilutive shares | 287,408 | 1,705 | 3,076 | 5,519 |

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