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Note 15 - Growth Equity Fund (Details Textual) - A3 Ventures Fund 1, L.P [Member] - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Feb. 28, 2024
Sep. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Variable Interest Entity, Financial or Other Support, Amount $ 50.0   $ 50.0  
Management Fee, Percent of Total Commitment 2.00%      
Financing Receivable, Credit Loss, Expense (Reversal)   $ 3.5    
Increase (Decrease) in Variable Interest Entity Liability   $ (0.8)    
Interest Receivable     0.5  
Management Fee Payable     $ 1.6 $ 2.4