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Organization and Significant Accounting Policies - Government Contracts (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 29, 2022	Jan. 30, 2021	Jan. 29, 2022	Jan. 30, 2021
Numerator for basic earnings per share:
Net income (loss) attributable to AeroVironment, Inc.	$ 10	$ 211	$ (11,446)	$ 12,385
Denominator for basic earnings per share:
Weighted average common shares	24,710,991	23,942,782	24,657,846	23,924,017
Dilutive effect of employee stock options, restricted stock and restricted stock units	168,652	318,092		292,354
Denominator for diluted earnings (loss) per share	24,879,643	24,260,874	24,657,846	24,216,371
Number of shares reserved for issuance	0		0
Number of anti-dilutive shares	20,554	0	237,909	24

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