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Organization and Significant Accounting Policies - Government Contracts (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Oct. 26, 2019 | Oct. 27, 2018 | Oct. 26, 2019 | Oct. 27, 2018 | Apr. 30, 2019
Government Contracts |  |  |  |  |
Reserves for incurred cost claim audits | $ 345,000 |  | $ 345,000 |  | $ 93,000
Numerator for basic earnings per share: |  |  |  |  |
Continuing operations attributable to AeroVironment | 7,501,000 | $ 7,047,000 | 24,611,000 | $ 27,384,000 |
Discontinued operations, net of tax |  | (990,000) |  | 6,003,000 |
Net income attributable to AeroVironment | $ 7,501,000 | $ 6,057,000 | $ 24,611,000 | $ 33,387,000 |
Denominator for basic earnings per share: |  |  |  |  |
Weighted average common shares | 23,804,364 | 23,667,400 | 23,775,355 | 23,621,720 |
Dilutive effect of employee stock options, restricted stock and restricted stock units | 257,446 | 431,433 | 288,420 | 437,674 |
Denominator for diluted earnings per share | 24,061,810 | 24,098,833 | 24,063,775 | 24,059,394 |
Number of shares reserved for issuance that are anti-dilutive | 8,402 | 598 | 4,358 | 7,130 |

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