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Accounts receivable, prepayments, deposits and other receivables - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Apr. 30, 2023
Apr. 30, 2022
May 01, 2021
Disclosure of Detailed Information of Accounts and Other Receivables [Line Items]      
Accounts receivable credit period 15 days    
Digital Solutions Services Financial Services Segment [Member]      
Disclosure of Detailed Information of Accounts and Other Receivables [Line Items]      
Commission receivable from insurance brokerage     $ 357
Digital Solutions Services Non Financial Services Segment [Member]      
Disclosure of Detailed Information of Accounts and Other Receivables [Line Items]      
Accounts receivables $ 635 $ 185 $ 8,584
Past due 90 days or more [Member]      
Disclosure of Detailed Information of Accounts and Other Receivables [Line Items]      
Accounts receivables $ 361 $ 185  
Bottom of range [member]      
Disclosure of Detailed Information of Accounts and Other Receivables [Line Items]      
Accounts receivable credit period 0 days    
Top of range [member]      
Disclosure of Detailed Information of Accounts and Other Receivables [Line Items]      
Accounts receivable credit period 90 days