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Note 12 - Subsequent Events (Details Textual) - ATM [Member] - USD ($)
 1 Months Ended 3 Months Ended
May 13, 2026
Mar. 31, 2026
Mar. 31, 2025
Stock Issued During Period, Shares, New Issues   184,725 81,274
Stock Issued During Period, Value, New Issues   $ 185,000 $ 185,000
Sale of Stock, Available Value   $ 5,100,000  
Subsequent Event [Member]      
Stock Issued During Period, Shares, New Issues 434,352    
Shares Issued, Price Per Share $ 1.23    
Stock Issued During Period, Value, New Issues $ 536,000    
Sale of Stock, Available Value $ 4,500,000