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Note 11 - Investments in Unconsolidated Entities - Summary of Individual Sensitivities of Key Unobservable Inputs to the Fair Value Measurement (Details) - OPay Digital Services Limited [member] - PWERM [member] - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Weighted average equity value [member]    
Disclosure of unconsolidated structured entities [line items]    
Change in assumption, percentage [1] 10.00%  
Decrease in assumption $ (25,495) $ (24,791)
Increase in assumption 25,495 24,791
Time to exit [member]    
Disclosure of unconsolidated structured entities [line items]    
Decrease in assumption 48,553 47,872
Increase in assumption $ (40,855) (40,263)
Time to exit (Year) [1] 1 year  
Relative change in probability of sale [member]    
Disclosure of unconsolidated structured entities [line items]    
Change in assumption, percentage [1],[2] 100.00%  
Decrease in assumption [2] $ 826 (630)
Increase in assumption [2] $ (826) 630
Discount for lack of marketability1 [member]    
Disclosure of unconsolidated structured entities [line items]    
Change in assumption, percentage [1] 5.00%  
Decrease in assumption $ 14,350 14,072
Increase in assumption $ (14,350) (14,072)
Discount rate, measurement input [member]    
Disclosure of unconsolidated structured entities [line items]    
Change in assumption, percentage [1] 2.00%  
Decrease in assumption $ 6,965 9,759
Increase in assumption $ (6,657) (9,202)
Financial forecast of profit (loss) for cash-generating unit, measurement input [member]    
Disclosure of unconsolidated structured entities [line items]    
Change in assumption, percentage [1],[3] 10.00%  
Decrease in assumption [3]   (8,452)
Increase in assumption [3]   $ 5,017
[1] pp - percentage points.
[2] Represents a relative change in the probabilities of sale scenarios, offset by an equal change in the probabilities of initial public offering scenarios.
[3] Only applicable to the preferred shares acquired in 2023, as discussed above.