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Related Party Transactions (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 30, 2021	Oct. 31, 2020	Oct. 30, 2021	Oct. 31, 2020	Apr. 30, 2021
Long-Term Incentive Awards
Revenue	$ 10,342	$ 11,452	$ 20,694	$ 27,838
Unbilled related party receivables	9,215		9,215		$ 544
HAPSMobile | Design and Development Agreement
Long-Term Incentive Awards
Maximum net value	185,202		185,202
Revenue	10,342		20,694
Unbilled related party receivables	9,215		9,215		$ 544
SoftBank | Design and Development Agreement
Long-Term Incentive Awards
Maximum net value	$ 51,200		$ 51,200
Revenue		$ 11,452		$ 27,838

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