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Accumulated Other Comprehensive Income (Loss) and Reclassifications Adjustments - Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Oct. 30, 2021	Oct. 31, 2020	Oct. 30, 2021	Oct. 31, 2020	Apr. 30, 2021	Apr. 30, 2020
Accumulated other comprehensive loss
Unrealized losses, tax portion	$ 0	$ (3)	$ 0	$ 1
Accumulated Other Comprehensive Loss
Accumulated other comprehensive loss
Other comprehensive income, tax			$ 1	$ 1	$ 1	$ 0

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Amount of tax expense (benefit), after reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities, attributable to parent entity. Excludes amounts related to other than temporary impairment (OTTI) loss.

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Amount of tax expense (benefit) allocated to other comprehensive income (loss).

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