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Note 2 - Summary of Significant Accounting Policies - Annual Amortization Expense (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
2025 $ 34  
2026 133  
2027 36  
2028 36  
2029 36  
Thereafter 467  
Total $ 742 $ 841