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Note 8 - Warrants (Details Textual) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended
Jun. 15, 2025
Jun. 09, 2025
Jun. 06, 2025
Jun. 05, 2025
May 05, 2025
Apr. 02, 2025
Mar. 17, 2025
Feb. 07, 2025
May 31, 2025
Mar. 31, 2025
Jun. 30, 2025
Jun. 30, 2025
Jun. 30, 2024
Jun. 17, 2025
May 04, 2025
Dec. 31, 2024
Oct. 31, 2024
May 31, 2024
Apr. 12, 2024
Mar. 06, 2024
Amended Warrants Reclassified to Stockholders' Equity           $ 7,766,000           $ 7,766,000 $ 0              
Series F Warrants [Member]                                        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)         $ 0.83   $ 1.2       $ 0.9529 [1] $ 0.9529 [1]     $ 1.1 $ 4.96       $ 30
Class of Warrant or Right, Issued (in shares)       2,054,262 602,846   415,420 450,390                        
Class of Warrant or Right, Intrinsic Value                     $ 330,639 $ 330,639                
Deemed Dividend on Warrants                       $ 116,199 $ 7,751 [2]              
Series F Warrants [Member] | Alpha [Member]                                        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)   838,364 418,831   602,846   415,420 450,390           797,067       14,189 28,378 16,588
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)   $ 1.1928 $ 1.1938   $ 0.8294   $ 1.2036 $ 2.2203           $ 1.2546       $ 60.29 $ 60.29 $ 60.29
Warrants and Rights Outstanding, Term (Year) 3 years 3 years 3 years   3 years   3 years 3 years           3 years       3 years 3 years 3 years
Class of Warrant or Right, Issued (in shares) 797,067 838,364 418,831                                  
Class of Warrant or Right, Conversion Price of Warrants or Rights (in dollars per share) $ 1.2546 $ 1.1928 $ 1.1938                                  
Series A and B Warrants [Member]                                        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)                 $ 0.8294 $ 1.2 $ 1.9445 [1] $ 1.9445 [1]       $ 1.9445        
Warrants and Rights Outstanding, Term (Year)                                 5 years      
Class of Warrant or Right, Issued (in shares)                 3,057,622 2,582,234                    
Deemed Dividend on Warrants                     $ 2,426,968                  
Series B Warrants [Member]                                        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)         $ 0.83                   $ 1.94          
Deemed Dividend on Warrants                       $ 2,426,968                
Amended Warrants Reclassified to Stockholders' Equity                     $ 7,766,000 $ 7,766,000                
Series A Warrants [Member]                                        
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)                     2 2                
[1] Reflects the exercise price after the March 2025 Down Round Trigger on March 17, 2025 as described above.
[2] On May 31, 2024, the Company agreed to reduce the exercise price of a warrant held by Alpha originally issued in June 2023 from $380.00 to $30.00. As result, the Company recorded a deemed dividend of $7,751 for the incremental value due to the modification.