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Note 3 - Business Combination (Details Textual) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Jan. 29, 2025
Apr. 30, 2026
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Ydentic B.V. [Member] | Ydentic Holding B.V. [Member]              
Subsidiary, Ownership Percentage, Parent 100.00%            
Ydentic Holding B.V. [Member]              
Business Combination, Voting Equity Interest Acquired, Percentage 80.00%            
Business Combination, Consideration Transferred and to be Transferred $ 20,400            
Payments to Acquire Businesses, Gross $ 14,900            
Business Acquisition, Settlement of Liability, Percentage of Shares Outstanding   6.67%          
Payments to Settle Business Acquisition Liability   $ 1,800          
Ydentic Holding B.V. [Member] | Shares Subject to Mandatory Redemption [Member]              
Business Combination, Voting Equity Interest Acquired, Percentage 20.00% 20.00%          
Business Combination, Consideration Transferred, Equity Interest $ 5,500            
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount     $ 5,900   $ 5,900   $ 6,200
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount, Current     2,800   2,800   1,900
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount, Noncurrent     3,100   3,100   $ 4,300
Schedule of Financial Instruments Subject to Mandatory Redemption, Interest Income (Expense)     $ 1,500 $ 0 $ 1,700 $ 800