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CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, shares authorized 5,000,000 5,000,000
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized 100,000,000 100,000,000
Common stock, shares issued 8,859,133 1,058,892
Common stock, shares outstanding 8,859,133 1,058,892
6% Convertible Exchangeable Preferred Stock    
Preferred stock, shares issued 135,273 335,273
Preferred stock, shares outstanding 135,273 335,273
Dividend rate on convertible exchangeable preferred stock (in percent) 6.00% 6.00%
Preferred stock, liquidation preference value (in dollars) $ 1,697,676 $ 4,006,512
Series A Convertible Preferred Stock    
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, shares issued 264 264
Preferred stock, shares outstanding 264 264
Series B Convertible Preferred Stock    
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, shares issued 0 119,000
Preferred stock, shares outstanding 0 119,000