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Income Tax Expense - Additional Information (Detail) $ in Thousands, $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Apr. 30, 2023 HKD ($) | Apr. 30, 2022 HKD ($) | Apr. 30, 2021 HKD ($) | Apr. 30, 2023 USD ($) | Apr. 30, 2022 USD ($)
Statement [Line Items] |  |  |  |  |
Applicable tax rate | 16.50% |  |  |  |
Unused tax losses for which no deferred tax asset recognised |  |  |  | $ 60,865 | $ 1,806
Hongkong [member] | First Tier Profit Regime [Member] |  |  |  |  |
Statement [Line Items] |  |  |  |  |
Accounting profit |  | $ 2,000 |  |  |
Applicable tax rate |  | 8.25% |  |  |
Hongkong [member] | Second Tier Profit Regime [Member] |  |  |  |  |
Statement [Line Items] |  |  |  |  |
Accounting profit |  | $ 2,000 |  |  |
Applicable tax rate |  | 16.50% |  |  |
Hongkong [member] | Not Qualifying For The TwoTiered Profits Tax Rates Regime [Member] |  |  |  |  |
Statement [Line Items] |  |  |  |  |
Applicable tax rate |  | 16.50% |  |  |
Singapore CIT [Member] |  |  |  |  |
Statement [Line Items] |  |  |  |  |
Accounting profit | $ 0 | $ 0 | $ 0 |  |
Applicable tax rate | 17.00% |  |  |  |
CANADA |  |  |  |  |
Statement [Line Items] |  |  |  |  |
Accounting profit | $ 0 |  |  |  |
Applicable tax rate | 33.00% |  |  |  |

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- Definition The amount of profit (loss) for a period before deducting tax expense. [Refer: Profit (loss)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2022-03-24 -Paragraph 81 -Subparagraph c -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2022-en-r&anchor=para_81_c_i&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2022-03-24 -Paragraph 81 -Subparagraph c -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2022-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2022-03-24 + Details
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