Quarterly report [Sections 13 or 15(d)]

Note 7 - Commitments and Contingencies (Details Textual)

v3.25.2
Note 7 - Commitments and Contingencies (Details Textual)
1 Months Ended 6 Months Ended 12 Months Ended
Mar. 19, 2024
USD ($)
$ / shares
shares
Mar. 12, 2024
shares
Jan. 31, 2025
shares
Jun. 30, 2024
USD ($)
shares
May 31, 2024
USD ($)
$ / shares
shares
Jun. 30, 2024
USD ($)
shares
Dec. 31, 2024
USD ($)
shares
Dec. 31, 2023
shares
Jun. 30, 2025
Mar. 31, 2024
Stock Issued During Period, Shares, New Issues (in shares) | shares     6,563       6,563      
Certain Claims Arising From an Interpretation of Certain Rights of SPA [Member]                    
Stock Issued During Period, Shares, New Issues (in shares) | 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   0.0421        
Measurement Input, Price Volatility [Member]                    
Warrants and Rights Outstanding, Measurement Input       0.98   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 (in shares) | shares       80,381 16,074 80,381        
Minimum [Member] | Measurement Input, Risk Free Interest Rate [Member]                    
Warrants and Rights Outstanding, Measurement Input             0.0427   0.0368  
Minimum [Member] | Measurement Input, Expected Term [Member]                    
Warrants and Rights Outstanding, Measurement Input             2.71   2.21 3.89
Minimum [Member] | Measurement Input, Price Volatility [Member]                    
Warrants and Rights Outstanding, Measurement Input                 1.03  
Maximum [Member] | Measurement Input, Risk Free Interest Rate [Member]                    
Warrants and Rights Outstanding, Measurement Input             0.0438   0.0374  
Maximum [Member] | Measurement Input, Expected Term [Member]                    
Warrants and Rights Outstanding, Measurement Input       4.47   4.47 4.74   4.24  
Maximum [Member] | Measurement Input, Price Volatility [Member]                    
Warrants and Rights Outstanding, Measurement Input                 1.07  
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 (in shares) | 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 | $ / 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 | $ / shares         $ 521.6          
Preferred Stock, Convertible, Conversion Price Floor | $ / shares         $ 104.32