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Revenue - Summary of Disaggregation of Revenue from Contracts with Customers (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Apr. 30, 2023
Apr. 30, 2022
Apr. 30, 2021
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers $ 33,066 $ 25,271 [1] $ 25,251 [1]
Digital solutions services - non financial services [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 28,037 23,689 23,740
Digital solutions services financial services segment [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 1,540 1,514 1,511
Hotel operations, hospitality and VIP services segment [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 2,195    
Digital media, content, and marketing services and others segment [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 1,294 68 0
A point in time [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 1,540 1,514 1,511
A point in time [member] | Digital solutions services - non financial services [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 0 0 0
A point in time [member] | Digital solutions services financial services segment [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 1,540 1,514 1,511
A point in time [member] | Hotel operations, hospitality and VIP services segment [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 0    
A point in time [member] | Digital media, content, and marketing services and others segment [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 0 0 0
Over time [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 31,526 23,757 23,740
Over time [member] | Digital solutions services - non financial services [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 28,037 23,689 23,740
Over time [member] | Digital solutions services financial services segment [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 0 0 0
Over time [member] | Hotel operations, hospitality and VIP services segment [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 2,195    
Over time [member] | Digital media, content, and marketing services and others segment [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 1,294 68 0
Digital solutions services—non financial services [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 28,037 23,689 23,740
Digital solutions services—non financial services [member] | Digital solutions services - non financial services [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 28,037 23,689 23,740
Digital solutions services—non financial services [member] | Digital solutions services financial services segment [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 0 0 0
Digital solutions services—non financial services [member] | Hotel operations, hospitality and VIP services segment [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 0    
Digital solutions services—non financial services [member] | Digital media, content, and marketing services and others segment [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 0 0 0
Digital solutions services—financial services [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 1,540 1,514 1,511
Digital solutions services—financial services [member] | Digital solutions services - non financial services [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 0 0 0
Digital solutions services—financial services [member] | Digital solutions services financial services segment [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 1,540 1,514 1,511
Digital solutions services—financial services [member] | Hotel operations, hospitality and VIP services segment [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 0    
Digital solutions services—financial services [member] | Digital media, content, and marketing services and others segment [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 0 0 $ 0
Digital media, content, and marketing services [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 1,294 68  
Digital media, content, and marketing services [member] | Digital solutions services - non financial services [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 0 0  
Digital media, content, and marketing services [member] | Digital solutions services financial services segment [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 0 0  
Digital media, content, and marketing services [member] | Hotel operations, hospitality and VIP services segment [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 0    
Digital media, content, and marketing services [member] | Digital media, content, and marketing services and others segment [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 1,294 $ 68  
Hotel operations, hospitality and VIP services [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 2,195    
Hotel operations, hospitality and VIP services [member] | Digital solutions services - non financial services [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 0    
Hotel operations, hospitality and VIP services [member] | Digital solutions services financial services segment [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 0    
Hotel operations, hospitality and VIP services [member] | Hotel operations, hospitality and VIP services segment [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 2,195    
Hotel operations, hospitality and VIP services [member] | Digital media, content, and marketing services and others segment [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers $ 0    
[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.