v3.26.1
Note 13 - Preferred Stock (Details Textual) - USD ($)
 2 Months Ended 3 Months Ended
Dec. 23, 2025
Dec. 11, 2025
Dec. 09, 2025
Nov. 05, 2025
Sep. 26, 2025
Aug. 21, 2025
Aug. 15, 2025
Jul. 31, 2025
Jun. 25, 2025
Apr. 29, 2025
Mar. 31, 2025
Feb. 11, 2025
Oct. 08, 2025
Mar. 31, 2026
Sep. 26, 2025
Dec. 31, 2025
Feb. 10, 2025
Preferred Stock, Shares Authorized (in shares)                           10,000,000   10,000,000  
Preferred Stock, Shares Issued (in shares)                           403   403  
Preferred Stock, Par or Stated Value Per Share (in dollars per share)                           $ 0.0001   $ 0.0001  
Preferred Stock, Shares Outstanding (in shares)                           403   403  
Conversion of Series B Preferred Stock into Common [Member]                                  
Conversion of Stock, Shares Converted (in shares) 1,185     160     700           700        
Conversion of Stock, Shares Issued (in shares) 743,330     70,220     244,597           252,710        
Conversion of Series C Preferred Stock into Common Stock [Member]                                  
Conversion of Stock, Shares Converted (in shares)                           233      
Conversion of Stock, Shares Issued (in shares)                           343,324      
Convertible Note [Member]                                  
Debt Instrument, Convertible, Stock Price Trigger (in dollars per share)     $ 0.39                            
Debt Instrument, Convertible, Maximum Shares Issuable, Percent of Outstanding     19.99%                            
Statera Securities Purchase Agreement [Member]                                  
Proceeds from Issuance or Sale of Equity                       $ 1,200,000          
Statera Securities Purchase Agreement [Member] | Common Stock [Member]                                  
Stock Issued During Period, Shares, New Issues (in shares)                       55,635          
Statera and Avenue Securities Purchase Agreement [Member]                                  
Stock Issued During Period, Value, New Issues                     $ 500,000            
Statera and Avenue Securities Purchase Agreement [Member] | Common Stock [Member]                                  
Stock Issued During Period, Shares, New Issues (in shares)                     55,704            
Preferred Purchase Agreement [Member]                                  
Equity Issuable, Maximum Value, Tranched Financing     $ 75,000,000             $ 8,400,000              
Proceeds from Issuance or Sale of Equity, Gross         $ 1,750,000 $ 1,750,000     $ 700,000                
Proceeds from Issuance or Sale of Equity   $ 11,900,000       $ 1,600     $ 585,000                
Investor Right to Participate in Financing, Percent     20.00%                            
Preferred Purchase Agreement [Member] | Tranche Closing Warrants [Member]                                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)   2,904,528     195,793 188,842     61,287           195,793    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)   $ 2.231 $ 2.231   $ 3.04       $ 3.85           $ 3.04    
Warrant, Down Round Feature, Increase (Decrease) in Equity, Amount           $ 5,000                      
Warrants and Rights Outstanding, Term (Year)     5 years   4 years 4 years                 4 years    
Class of Warrant or Right, Exercise Price of Warrants or Rights, Percent of Closing Price per Share         110.00% 110.00%                 110.00%    
Conversion of Warrant, Ownership Percent     50.00%                            
Preferred Purchase Agreement [Member] | First Tranche Investor Warrants [Member]                                  
Proceeds from Issuance or Sale of Equity   $ 5,900,000             $ 187,000                
Preferred Purchase Agreement [Member] | Third Tranche Closing, Placement Agent Services [Member]                                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)         29,830                   29,830    
Preferred Purchase Agreement [Member] | Third Tranche Investor Warrants [Member]                                  
Proceeds from Issuance or Sale of Equity           $ 500                      
Preferred Purchase Agreement [Member] | Fourth Tranche Closing [Member]                                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)         32,249                   32,249    
Second Tranche Closing [Member] | Tranche Closing Warrants [Member]                                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)         64,065                   64,065    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)           $ 3.372                      
Warrant, Down Round Feature, Increase (Decrease) in Equity, Amount         $ 4,000                        
Common Stock Warrants [Member] | Tranche Closing Warrants [Member]                                  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)         $ 3.04                   $ 3.04    
Fourth Tranche Closing [Member] | Tranche Closing Warrants [Member]                                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                 61,287                
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)         $ 3.04                   3.04    
Warrant, Down Round Feature, Increase (Decrease) in Equity, Amount         $ 1,000                        
Tranche Closing, Placement Agent Services [Member]                                  
Payments of Stock Issuance Costs                 $ 56,000                
Preferred Purchase Agreement, Placement Agent [Member] | Tranche Closing Warrants [Member]                                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                 10,000                
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)           $ 3.52     $ 4.2                
Warrants and Rights Outstanding, Term (Year)                 4 years                
Class of Warrant or Right, Exercise Price of Warrants or Rights, Percent of Closing Price per Share                 110.00%                
Preferred Purchase Agreement, Placement Agent [Member] | Fourth Tranche Closing [Member]                                  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)         $ 3.256                   $ 3.256    
Second Tranche Closing, Placement Agent Services [Member]                                  
Payments of Stock Issuance Costs           $ 140,000   $ 56,000                  
Proceeds from Issuance or Sale of Equity               $ 625,000                  
Second Tranche Closing, Placement Agent Services [Member] | Second Tranche Investor Warrants [Member]                                  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)               $ 3.996                  
Proceeds from Issuance or Sale of Equity               $ 167,000                  
Second Tranche Closing, Placement Agent Services [Member] | Second Tranche Warrants [Member]                                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)               11,068                  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)               $ 3.795                  
Warrants and Rights Outstanding, Term (Year)               4 years                  
Class of Warrant or Right, Exercise Price of Warrants or Rights, Percent of Closing Price per Share               110.00%                  
Third Tranche Closing [Member] | Tranche Closing Warrants [Member]                                  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)           $ 3.372                      
Third Tranche Closing, Placement Agent Services [Member]                                  
Preferred Stock, Shares Outstanding (in shares)                           1,590      
Temporary Equity, Carrying Amount, Attributable to Parent                           $ 1,000,000      
Fourth Tranche Closing, Placement Agent Services [Member]                                  
Payments of Stock Issuance Costs         $ 140,000                        
Proceeds from Issuance or Sale of Equity         $ 1,600,000                        
Preferred Stock, Shares Outstanding (in shares)                           565      
Temporary Equity, Carrying Amount, Attributable to Parent                           $ 371,000   $ 361,000  
Fourth Tranche Closing, Placement Agent Services [Member] | Fourth Tranche Investor Warrants [Member]                                  
Proceeds from Issuance or Sale of Equity                             $ 500,000    
Series A Preferred Stock [Member]                                  
Preferred Stock, Shares Authorized (in shares)                                 6,000
Preferred Stock, Shares Issued (in shares)                           403   403  
Preferred Stock, Par or Stated Value Per Share (in dollars per share)                           $ 0.0001      
Preferred Stock, Shares Outstanding (in shares)                           403   403  
Series A Preferred Stock [Member] | Statera Securities Purchase Agreement [Member]                                  
Stock Issued During Period, Shares, New Issues (in shares)                       360          
Stock Issued During Period, Value, New Issues                       $ 1,200,000          
Series A Preferred Stock [Member] | Statera and Avenue Securities Purchase Agreement [Member]                                  
Stock Issued During Period, Shares, New Issues (in shares)                     131            
Series B Preferred Stock [Member]                                  
Preferred Stock, Shares Authorized (in shares)                   8,400              
Preferred Stock, Shares Issued (in shares)                           2,155   2,155  
Preferred Stock, Par or Stated Value Per Share (in dollars per share)                           $ 0.0001      
Preferred Stock, Shares Outstanding (in shares)                           2,155   2,155  
Temporary Equity, Carrying Amount, Attributable to Parent                           $ 1,420,000   $ 1,379,000  
Series B Preferred Stock [Member] | Preferred Purchase Agreement [Member]                                  
Stock Issued During Period, Shares, New Issues (in shares)         1,750 1,750     700                
Equity Issuable, Maximum Number of Shares (in shares)                   8,400              
Proceeds from Issuance or Sale of Equity           $ 1,100     $ 398,000                
Series B Preferred Stock [Member] | Second Tranche Closing [Member]                                  
Stock Issued During Period, Shares, New Issues (in shares)               700                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)               64,065                  
Proceeds from Issuance or Sale of Equity               $ 700                  
Series B Preferred Stock [Member] | Second Tranche Closing, Placement Agent Services [Member]                                  
Proceeds from Issuance or Sale of Equity               $ 458,000                  
Series B Preferred Stock [Member] | Fourth Tranche Closing, Placement Agent Services [Member]                                  
Proceeds from Issuance or Sale of Equity                             $ 1,100,000    
Series C Preferred Stock [Member]                                  
Preferred Stock, Shares Authorized (in shares)     75,000                            
Preferred Stock, Shares Issued (in shares)                           11,767   12,000  
Preferred Stock, Par or Stated Value Per Share (in dollars per share)                           $ 0.0001      
Preferred Stock, Shares Outstanding (in shares)                           11,767   12,000  
Temporary Equity, Carrying Amount, Attributable to Parent                           $ 6,066,000   $ 5,991,000  
Series C Preferred Stock [Member] | Preferred Purchase Agreement [Member]                                  
Preferred Stock, Par or Stated Value Per Share (in dollars per share)     $ 1,000                            
Equity Issuable, Maximum Number of Shares (in shares)     75,000                            
Proceeds from Issuance or Sale of Equity   $ 5,900,000                              
Equity Issuable, Maximum Number of Shares, Tranche One (in shares)   12,000 12,000                            
Equity Issuable, Maximum Value of Shares, Tranche One   $ 12,000,000 $ 12,000,000                            
Equity Issuable, Maximum Number of Shares, Tranche Two (in shares)     6,000                            
Equity Issuable, Maximum Value of Shares, Tranche Two     $ 6,000,000                            
Equity Issuable, Maximum Number of Shares, Tranche Three (in shares)     57,000                            
Equity Issuable, Maximum Value of Shares, Tranche Three     $ 57,000,000                            
Equity Issuable, Maximum Aggregate Stated Value     $ 3,000,000                            
Equity Issuable, Minimum Shares Outstanding for First Refusal (in shares)     1,200