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Profit for the Year - Summary of Profit for the Year (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Apr. 30, 2023 | Apr. 30, 2022 | Apr. 30, 2021
Disclosure of profit for the year [line items] |  |  |  |  |
Staff costs | $ 9,868 | $ 9,293 | [1] | $ 6,193 | [1]
Share of losses of joint ventures (including in other expenses) | 401 | 0 | [1] | 0 | [1]
Depreciation and amortization | 1,988 | 846 |  | 631 |
Salaries, allowances and other benefits [member] |  |  |  |  |
Disclosure of profit for the year [line items] |  |  |  |  |
Directors' emoluments | 1,125 | 509 |  | 570 |
Staff costs | 8,610 | 8,616 |  | 5,456 |
Retirement benefit scheme contributions [member] |  |  |  |  |
Disclosure of profit for the year [line items] |  |  |  |  |
Directors' emoluments | 9 | 8 |  | 9 |
Staff costs | $ 124 | $ 160 |  | $ 158 |
[1] | The comparative consolidated financial statements have been re-presented from Hong Kong dollar to US$ to reflect the Company’s change in presentation currency. See note 1.

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