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Pension - Projected benefit obligation and fair value of plan assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	May 03, 2021
Pension
Defined Benefit Plan, Funding Status [Extensible List]	us-gaap:UnderfundedPlanMember
Pension Plan
Pension
Projected benefit obligation	$ (3,322)	$ (4,126)
Fair value of plan assets	3,395	$ 3,951
Funded status of the plan	$ 73

X

- Definition

Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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- Definition

Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status.

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Indicates status of funding for defined benefit plan designed to provide retirement benefits.

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X

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Namespace Prefix:
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Balance Type:
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