Annual report [Section 13 and 15(d), not S-K Item 405]

Note 10 - Commitments and Contingencies (Details Textual)

v3.26.1
Note 10 - Commitments and Contingencies (Details Textual)
1 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
May 31, 2018
USD ($)
Dec. 31, 2025
USD ($)
ft²
shares
Dec. 31, 2024
USD ($)
shares
Dec. 31, 2023
USD ($)
shares
Oct. 22, 2025
Aug. 31, 2024
shares
Operating Lease, Expense             $ 58,000 $ 141,000      
Stock Issued During Period, Shares, New Issues | shares     547         547      
Director [Member]                      
Consulting Agreement, Monthly Payment           $ 7,500          
Consulting Agreement, Renewal Period           1 year          
Director [Member] | Consulting Fees [Member]                      
Related Party Transaction, Amounts of Transaction                 $ 90,000    
Certain Claims Arising From an Interpretation of Certain Rights of SPA [Member]                      
Stock Issued During Period, Shares, New Issues | shares 41,667 41,667             760,000    
Shares Issued, Price Per Share | $ / shares $ 22.2                    
Stock Issued During Period, Value, New Issues $ 924,000                    
Litigation Settlement, Fee Expense               $ 164,000      
Measurement Input, Price Volatility [Member]                      
Warrants and Rights Outstanding, Measurement Input               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             6,699       1,340
Minimum [Member] | Measurement Input, Risk Free Interest Rate [Member]                      
Warrants and Rights Outstanding, Measurement Input             0.0347 0.0427   0.0345  
Minimum [Member] | Measurement Input, Expected Term [Member]                      
Warrants and Rights Outstanding, Measurement Input             1.7 2.71   2  
Minimum [Member] | Measurement Input, Price Volatility [Member]                      
Warrants and Rights Outstanding, Measurement Input             1.53     0.93  
Maximum [Member] | Measurement Input, Risk Free Interest Rate [Member]                      
Warrants and Rights Outstanding, Measurement Input             0.0364 0.0438   0.035  
Maximum [Member] | Measurement Input, Expected Term [Member]                      
Warrants and Rights Outstanding, Measurement Input             3.73 4.74   3  
Maximum [Member] | Measurement Input, Price Volatility [Member]                      
Warrants and Rights Outstanding, Measurement Input             1.60     1  
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         1,146            
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Granted, Aggregate Intrinsic Value         $ 516,000            
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         777     3,882      
Pioneer Capital Anstalt [Member] | Series AA Preferred Additional Investment Rights [Member] | Measurement Input, Share Price [Member]                      
Warrants and Rights Outstanding, Measurement Input         10.32            
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         22.63            
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         $ 113.16            
Preferred Stock, Convertible, Conversion Price Floor | $ / shares         $ 22.63            
Pioneer Capital Anstalt [Member] | Maximum [Member] | Series AA Preferred Additional Investment Rights [Member] | Measurement Input, Conversion Price [Member]                      
Warrants and Rights Outstanding, Measurement Input         156.48            
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         $ 156.48            
Preferred Stock, Convertible, Conversion Price Floor | $ / shares         $ 31.3            
Office Space [Member]                      
Area of Real Estate Property | ft²             200        
Operating Lease, Monthly Payments             $ 3,000