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Financial Instruments - Additional Information (Detail) $ in Thousands | 12 Months Ended
--- | ---
Apr. 30, 2023 USD ($) Customers | Apr. 30, 2022 USD ($) | Apr. 30, 2021 USD ($)
Disclosure of detailed information about financial instruments [line items] |  |  |
Concentration of credit risk commission receivable | 46.00% | 26.00% |
Concentration of credit risk commission receivable number of major customers | Customers | 5 |  |
Concentration of credit risk accounts receivable | 16.00% | 66.00% |
Concentration of credit risk accounts receivable number of major customers | Customers | 5 |  |
Allowance account for credit losses of financial assets | $ 0 | $ 0 |
Borrowings carrying amount | 50,803 |  |
Repayable within 1 Year [Member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Unsecured bank loans received | 3,251 |  |
Repayable Within 1 to 6 Year [Member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Secured bank loans received | 52,424 |  |
Financial assets at fair value through profit or loss, category [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gains (losses) recognised in profit or loss attributable to change in unrealised gains or losses for assets held at end of period, fair value measurement | 350 | 188 | $ 1,952
Transfer from Level 2 to Level 3 |  | 796 |
Accounts receivable arising from the SpiderNet ecosystem solutions business |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gain on recovery of loans and advances previously written off | $ 2 | $ 20 |
Market risk [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Percentage of reasonably possible increase in unobservable input, entity's own equity instruments | 3.00% | 3.00% | 3.00%
Percentage of reasonably possible decrease in unobservable input, entity's own equity instruments | 3.00% | 3.00% | 3.00%
Increase (decrease) in fair value measurement due to reasonably possible increase decrease in unobservable input, entity's own equity instruments | $ 15 | $ 335 | $ 823
Interest rate risk [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Borrowings, interest rate basis | 0.0050 |  |
Increase decrease in fair value measurement due to reasonably possible increase decrease in unobservable input borrowings | $ 139 | $ 275 |

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