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Operating Segments - Additional Information (Detail)
$ in Thousands
 12 Months Ended
Apr. 30, 2023
USD ($)
Segment
Apr. 30, 2022
USD ($)
Segment
Apr. 30, 2021
USD ($)
May 01, 2021
USD ($)
 [1]
Disclosure of operating segments [line items]        
Non current assets $ 342,173 $ 31,263 [1]   $ 52,651
Number of operating segments | Segment 4 3    
Digital solutions services—non financial services [member]        
Disclosure of operating segments [line items]        
Revenue $ 0 $ 1,554 $ 5,007  
Hongkong [member]        
Disclosure of operating segments [line items]        
Non current assets 172,141 4 6  
Canada [member]        
Disclosure of operating segments [line items]        
Non current assets 66,618      
Singapore [member]        
Disclosure of operating segments [line items]        
Non current assets 67,898 12,129 14,250  
External customers [member] | Hongkong [member]        
Disclosure of operating segments [line items]        
Revenue 31,736 25,158 24,950  
External customers [member] | Canada [member]        
Disclosure of operating segments [line items]        
Revenue 1,107      
External customers [member] | Singapore [member]        
Disclosure of operating segments [line items]        
Revenue $ 223 $ 113 $ 301  
[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.