v3.26.1
Note 9 - Debt (Details Textual)
3 Months Ended 6 Months Ended 12 Months Ended
Sep. 30, 2025
USD ($)
$ / shares
shares
Mar. 20, 2025
USD ($)
shares
Jan. 28, 2025
USD ($)
$ / shares
shares
Jan. 20, 2025
USD ($)
Oct. 10, 2024
USD ($)
$ / shares
shares
Aug. 14, 2024
USD ($)
$ / shares
shares
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Mar. 31, 2025
USD ($)
shares
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
$ / shares
shares
Dec. 31, 2024
USD ($)
shares
Aug. 12, 2024
USD ($)
Debt Issuance Costs                   $ 0 $ 350,000      
Proceeds from Convertible Debt                   0 5,000,000      
Gain (Loss) on Convertible Debt Redemption             $ (0) $ (1,874,000)   (0) (3,467,000)      
Consent and Waiver Agreement [Member]                            
Stock Issued During Period, Shares, New Issues (in shares) | shares   303,819                        
Stock Issued During Period, Value, New Issues   $ 600,000                        
Anson Warrants [Member]                            
Class of Warrant or Right, Securities Called by Warrants or Rights, Percentage of Principal Divided by VWAP                           50.00%
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares           1,349,305                
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares                       $ 1,870,960    
Class of Warrant or Right, Stock Price Trigger (in dollars per share) | $ / shares $ 3.25                          
Class of Warrant or Right, Percentage Trading Volume Threshold If Triggered 12.50%                          
Proceeds from Warrant Exercises $ 3,090,000.00                          
Stock Issued During Period, Shares, Warrants Exercised (in shares) | shares 1,870,960                          
Third Tranche Notes, Warrants [Member]                            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares     862,699                      
Consideration Warrants [Member]                            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares   303,819                        
Class of Warrant or Right Issued in Period (in shares) | shares   303,819                        
Proceeds from Issuance of Warrants   $ 600,000                        
Anson Convertible Notes [Member]                            
Debt Instrument, Number of Tranches                           3
Debt Instrument, Face Amount                       $ 16,305,000   $ 16,300,000
Long-Term Debt, Gross             $ 0     $ 0   0   $ 15,000,000
Placement Agent Fee, Percent of Gross Proceeds                           7.00%
Debt Instrument, Unamortized Discount                       1,305,000    
Anson Convertible Notes [Member] | Conversion of Principal and Interest Into Common Stock [Member]                            
Debt Conversion, Original Debt, Amount                       $ 1,300,000 $ 4,200,000  
Debt Conversion, Converted Instrument, Shares Issued (in shares) | shares                       7,300,000    
Gain (Loss) on Convertible Debt Redemption                       $ (6,200,000)    
Stock Issued During Period, Value, Conversion of Convertible Securities                       $ 18,900,000    
Anson First Tranche Notes [Member]                            
Debt Instrument, Face Amount           $ 5,435,000                
Debt Instrument, Original Issuance Discount           8.00%                
Debt Instrument, Unamortized Discount           $ 435,000                
Debt Issuance Costs           521,000                
Proceeds from Debt, Net of Issuance Costs           $ 4,500,000                
Debt Instrument, Interest Rate, Stated Percentage           6.00%                
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares           $ 2.4168                
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger           92.00%                
Anson First Tranche Notes [Member] | Conversion of Principal and Interest Into Common Stock [Member]                            
Debt Conversion, Original Debt, Amount                         $ 1,300,000  
Debt Conversion, Converted Instrument, Shares Issued (in shares) | shares                 1,004,055       3,676,796  
Gain (Loss) on Convertible Debt Redemption                 $ 1,600,000       $ (1,300,000)  
Anson Second Tranche Notes [Member]                            
Debt Instrument, Face Amount         $ 5,400,000                  
Placement Agent Fee, Percent of Gross Proceeds         7.00%                  
Debt Instrument, Original Issuance Discount         8.00%                  
Debt Instrument, Unamortized Discount         $ 435,000                  
Debt Issuance Costs         $ 375,000                  
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares         $ 1.7664             $ 1.65    
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger         92.00%                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares         1,846,128                  
Proceeds from Convertible Debt         $ 5,000,000                  
Debt Issuance Costs, Gross         $ 400,000                  
Anson Second Tranche Notes [Member] | Conversion of Principal and Interest Into Common Stock [Member]                            
Debt Conversion, Original Debt, Amount                       $ 5,800,000    
Anson, Third Tranche Notes [Member]                            
Debt Instrument, Face Amount     $ 5,435,000                      
Placement Agent Fee, Percent of Gross Proceeds     7.00%                      
Debt Instrument, Original Issuance Discount     8.00%                      
Debt Instrument, Unamortized Discount     $ 435,000                      
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares     $ 3.78                      
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger     92.00%                      
Proceeds from Convertible Debt     $ 5,000,000                      
Debt Issuance Costs, Gross     $ 400,000                      
Debt Instrument, Convertible, Threshold Trading Days     7                      
Anson, Third Tranche Notes [Member] | Conversion of Principal and Interest Into Common Stock [Member]                            
Debt Conversion, Original Debt, Amount       $ 100,000               5,500,000    
Debt Conversion, Converted Instrument, Shares Issued (in shares) | shares   5,463             5,463          
Stock Issued During Period, Value, Conversion of Convertible Securities                       $ 18,900,000    
Anson, Third Tranche Notes [Member] | Conversion of Principal and Interest Into Common Stock [Member] | Maximum [Member]                            
Debt Conversion, Original Debt, Amount                 $ 100,000          
Gain (Loss) on Convertible Debt Redemption                 $ (100,000)          
Anson Second and Third Tranche Notes [Member]                            
Liabilities, Fair Value Adjustment                     $ (5,600,000)