Quarterly report [Sections 13 or 15(d)]

Note 7 - Commitments and Contingencies (Details Textual)

v3.25.3
Note 7 - Commitments and Contingencies (Details Textual)
1 Months Ended 9 Months Ended 12 Months Ended
Mar. 19, 2024
USD ($)
$ / shares
shares
Mar. 12, 2024
shares
Jan. 31, 2025
shares
Jun. 30, 2024
USD ($)
May 31, 2024
USD ($)
$ / shares
shares
Sep. 30, 2024
USD ($)
shares
Dec. 31, 2024
USD ($)
shares
Dec. 31, 2023
shares
Sep. 30, 2025
Stock Issued During Period, Shares, New Issues | shares     6,563       6,563    
Certain Claims Arising From an Interpretation of Certain Rights of SPA [Member]                  
Stock Issued During Period, Shares, New Issues | shares 12,500 12,500           760,000  
Shares Issued, Price Per Share | $ / shares $ 74                
Stock Issued During Period, Value, New Issues | $ $ 924,000                
Litigation Settlement, Fee Expense | $           $ 164,000      
Measurement Input, Risk Free Interest Rate [Member]                  
Warrants and Rights Outstanding, Measurement Input           0.0421      
Measurement Input, Price Volatility [Member]                  
Warrants and Rights Outstanding, Measurement Input           0.98 1.01    
Series AA Preferred Additional Investment Rights [Member]                  
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease) | $       $ 294,000          
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares         16,074 80,381      
Minimum [Member] | Measurement Input, Risk Free Interest Rate [Member]                  
Warrants and Rights Outstanding, Measurement Input             0.0427   0.036
Minimum [Member] | Measurement Input, Expected Term [Member]                  
Warrants and Rights Outstanding, Measurement Input           3.89 2.71   1.96
Minimum [Member] | Measurement Input, Price Volatility [Member]                  
Warrants and Rights Outstanding, Measurement Input                 1.07
Maximum [Member] | Measurement Input, Risk Free Interest Rate [Member]                  
Warrants and Rights Outstanding, Measurement Input             0.0438   0.0368
Maximum [Member] | Measurement Input, Expected Term [Member]                  
Warrants and Rights Outstanding, Measurement Input           4.47 4.74   3.98
Maximum [Member] | Measurement Input, Price Volatility [Member]                  
Warrants and Rights Outstanding, Measurement Input                 1.14
Pioneer Capital Anstalt [Member] | Restricted Stock [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period | shares         6,875        
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Granted, Aggregate Intrinsic Value | $         $ 346,000        
Pioneer Capital Anstalt [Member] | Series AA Preferred Additional Investment Rights [Member]                  
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease) | $             $ 213,000    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares         9,315   46,576    
Pioneer Capital Anstalt [Member] | Series AA Preferred Additional Investment Rights [Member] | Measurement Input, Share Price [Member]                  
Warrants and Rights Outstanding, Measurement Input         34.4        
Pioneer Capital Anstalt [Member] | Series AA Preferred Additional Investment Rights [Member]                  
Preferred Stock, Extension Period of Exercise             6 months    
Pioneer Capital Anstalt [Member] | Minimum [Member] | Series AA Preferred Additional Investment Rights [Member] | Measurement Input, Conversion Price [Member]                  
Warrants and Rights Outstanding, Measurement Input         75.44        
Pioneer Capital Anstalt [Member] | Minimum [Member] | Series AA Preferred Additional Investment Rights [Member] | Measurement Input, Risk Free Interest Rate [Member]                  
Warrants and Rights Outstanding, Measurement Input         0.0513        
Pioneer Capital Anstalt [Member] | Minimum [Member] | Series AA Preferred Additional Investment Rights [Member] | Measurement Input, Expected Term [Member]                  
Warrants and Rights Outstanding, Measurement Input         0.52        
Pioneer Capital Anstalt [Member] | Minimum [Member] | Series AA Preferred Additional Investment Rights [Member] | Measurement Input, Price Volatility [Member]                  
Warrants and Rights Outstanding, Measurement Input         0.80        
Pioneer Capital Anstalt [Member] | Minimum [Member] | Series AA Preferred Additional Investment Rights [Member]                  
Preferred Stock, Convertible, Conversion Price (in dollars per share) | $ / shares         $ 377.2        
Preferred Stock, Convertible, Conversion Price Floor | $ / shares         $ 75.44        
Pioneer Capital Anstalt [Member] | Maximum [Member] | Series AA Preferred Additional Investment Rights [Member] | Measurement Input, Conversion Price [Member]                  
Warrants and Rights Outstanding, Measurement Input         521.6        
Pioneer Capital Anstalt [Member] | Maximum [Member] | Series AA Preferred Additional Investment Rights [Member] | Measurement Input, Risk Free Interest Rate [Member]                  
Warrants and Rights Outstanding, Measurement Input         0.0536        
Pioneer Capital Anstalt [Member] | Maximum [Member] | Series AA Preferred Additional Investment Rights [Member] | Measurement Input, Expected Term [Member]                  
Warrants and Rights Outstanding, Measurement Input         1.02        
Pioneer Capital Anstalt [Member] | Maximum [Member] | Series AA Preferred Additional Investment Rights [Member] | Measurement Input, Price Volatility [Member]                  
Warrants and Rights Outstanding, Measurement Input         0.93        
Pioneer Capital Anstalt [Member] | Maximum [Member] | Series AA Preferred Additional Investment Rights [Member]                  
Preferred Stock, Convertible, Conversion Price (in dollars per share) | $ / shares         $ 521.6        
Preferred Stock, Convertible, Conversion Price Floor | $ / shares         $ 104.32