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Note 11 - Investments in Unconsolidated Entities (Details Textual)
 12 Months Ended
Dec. 31, 2024
USD ($)
QuarterlyInvestment
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Disclosure of unconsolidated structured entities [line items]      
Share of net loss of equity-accounted investees $ (2,000) $ 0 $ (6,000)
Weighted average cost of capital, measurement input [member]      
Disclosure of unconsolidated structured entities [line items]      
Significant unobservable input, assets 0.14    
OPay Digital Services Limited [member]      
Disclosure of unconsolidated structured entities [line items]      
Proportion of ownership interest in entity classified as financial asset 9.40%    
Probability-weighted present value $ 3,000,000,000 $ 3,000,000,000  
Shares valuation, net reduction of value, percent   6.00%  
Change in fair value of preferred shares $ 4,900,000    
Discount rate applied to present value of cash flows 18.90%    
OPay Digital Services Limited [member] | Weighted average cost of capital, measurement input [member]      
Disclosure of unconsolidated structured entities [line items]      
Significant unobservable input, assets 0.189 0.189  
OPay Digital Services Limited [member] | Discount rate, measurement input [member]      
Disclosure of unconsolidated structured entities [line items]      
Significant unobservable input, assets 10 10  
OPay Digital Services Limited [member] | Long term stable growth rate [member]      
Disclosure of unconsolidated structured entities [line items]      
Significant unobservable input, assets 0.07    
Explanation of period over which revenue is expected to grow In the discounted cash flow analysis, revenue was estimated to grow at an annualized rate of 37% over the 2024-2031 period, and thereafter reaching a long-term growth rate of 7%.    
Annualized growth rate of revenue 37.00%    
OPay Digital Services Limited [member] | Bottom of range [member]      
Disclosure of unconsolidated structured entities [line items]      
Estimated future equity values $ 200,000,000    
Estimated future equity values, number of years 1 year    
Estimated Present Equity Values $ 100,000,000    
OPay Digital Services Limited [member] | Top of range [member]      
Disclosure of unconsolidated structured entities [line items]      
Estimated future equity values $ 6,000,000,000    
Estimated future equity values, number of years 3 years    
Estimated Present Equity Values $ 4,200,000,000    
Verda Ventures [Member]      
Disclosure of unconsolidated structured entities [line items]      
Invested amount $ 1,250,000    
Number of equal quarterly investments committed | QuarterlyInvestment 7    
Investment commitment $ 10,000,000    
Share of net loss of equity-accounted investees $ 2,000    
nHorizon [member]      
Disclosure of unconsolidated structured entities [line items]      
Proportion of ownership interest in associate 29.10%    
Unrecognized income (loss) from associates $ 31,000    
Accumulated balance of unrecognized share of losses in associates 200,000    
AB Fjord Bank [member]      
Disclosure of unconsolidated structured entities [line items]      
Proceeds from sales of financial assets $ 800,000