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Pension - Projected benefit obligation and fair value of plan assets (Details) $ in Thousands	12 Months Ended
	Apr. 30, 2023 USD ($)
Pension
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Pension Plan
Pension
Projected benefit obligation	$ (3,192)
Fair value of plan assets	3,870
Funded status of the plan	$ 678

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- 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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- 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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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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