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Quarterly Results of Operations (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Apr. 30, 2021	Jan. 30, 2021	Oct. 31, 2020	Aug. 01, 2020	Apr. 30, 2020	Jan. 25, 2020	Oct. 26, 2019	Jul. 27, 2019	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Selected Quarterly Financial Information
Revenue	$ 136,015	$ 78,782	$ 92,665	$ 87,450	$ 135,223	$ 61,891	$ 83,271	$ 86,911	$ 394,912	$ 367,296	$ 314,274
Gross margin	59,655	28,641	40,851	35,411	53,168	23,496	35,166	41,272	$ 164,558	$ 153,102	$ 128,403
Net (loss) income attributable to AeroVironment, Inc. from continuing operations	$ 10,946	$ 211	$ 2,094	$ 10,080	$ 17,736	$ (1,008)	$ 7,501	$ 17,110
Net (loss) income per share attributable to AeroVironment, Inc. from continuing operations-basic	$ 0.45	$ 0.01	$ 0.09	$ 0.42	$ 0.74	$ (0.04)	$ 0.32	$ 0.72	$ 0.97	$ 1.74	$ 1.77
Net (loss) income per share attributable to AeroVironment, Inc. from continuing operations-diluted	$ 0.44	$ 0.01	$ 0.09	$ 0.42	$ 0.73	$ (0.04)	$ 0.31	$ 0.71	$ 0.96	$ 1.72	$ 1.74
Number of weeks									91 days
LOON LLC
Selected Quarterly Financial Information
Amount of loss from impairment of investment									$ 8,363
Other expense
Selected Quarterly Financial Information
Legal accrual									$ 9,300

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