v3.26.1
Note 12 - Preferred Stock (Details Textual)
 1 Months Ended 2 Months Ended 12 Months Ended
Dec. 23, 2025
shares
Dec. 11, 2025
USD ($)
$ / shares
shares
Dec. 09, 2025
USD ($)
$ / shares
shares
Nov. 05, 2025
shares
Sep. 26, 2025
USD ($)
$ / shares
shares
Aug. 21, 2025
USD ($)
$ / shares
shares
Aug. 15, 2025
shares
Jul. 31, 2025
USD ($)
$ / shares
shares
Jul. 03, 2025
shares
Jun. 25, 2025
USD ($)
$ / shares
shares
Apr. 29, 2025
USD ($)
$ / shares
shares
Mar. 31, 2025
USD ($)
shares
Feb. 11, 2025
USD ($)
shares
Dec. 31, 2025
$ / shares
shares
Dec. 31, 2025
$ / shares
shares
May 31, 2024
shares
Oct. 08, 2025
shares
Dec. 31, 2025
USD ($)
$ / shares
shares
Sep. 30, 2025
Feb. 10, 2025
shares
Dec. 31, 2024
$ / shares
shares
Preferred Stock, Shares Authorized (in shares)                           10,000,000 10,000,000     10,000,000     10,000,000
Preferred Stock, Shares Issued (in shares)                           403 403     403     0
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares                           $ 0.0001 $ 0.0001     $ 0.0001     $ 0.0001
Stock Issued During Period, Shares, New Issues (in shares)                               277,059          
Stock Issued During Period, Value, New Issues | $                                   $ 4,037,000      
Warrant, Down Round Feature, Increase (Decrease) in Equity, Amount | $                                   $ 0      
Preferred Stock, Shares Outstanding (in shares)                           403 403     403     0
Convertible Note [Member]                                          
Debt Instrument, Convertible, Stock Price Trigger (in dollars per share) | $ / shares     $ 0.39                                    
Debt Instrument, Convertible, Maximum Shares Issuable, Percent of Outstanding     19.99%                                    
Common Stock [Member]                                          
Stock Issued During Period, Shares, New Issues (in shares)                                   519,831      
Stock Issued During Period, Value, New Issues | $                                   $ 0      
Warrant, Down Round Feature, Increase (Decrease) in Equity, Amount | $                                   $ 0      
Statera Securities Purchase Agreement [Member]                                          
Stock Issued During Period, Value, New Issues | $                         $ 1,200,000                
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                    
Investor Right to Participate in Financing, Percent     20.00%               20.00%                    
Investor Right to Use Financing to Redeem Shares, Percent                     25.00%                    
Payments for Services, Cash Fee                     8.00%                    
Payments for Services, Value of Common Stock, Percent                     6.00%                    
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                      
Preferred Purchase Agreement [Member] | Tranche Closing Warrants [Member]                                          
Conversion of Warrant, Ownership Percent     50.00%               30.00%                    
Warrants and Rights Outstanding, Term (Year)     5 years   4 years 4 years         5 years                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)   2,904,528     195,793 188,842       61,287       2,904,528 2,904,528     2,904,528      
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares   $ 2.231 $ 2.231   $ 3.04 $ 3.52       $ 3.85       $ 2.231 $ 2.231     $ 2.231      
Warrant, Down Round Feature, Increase (Decrease) in Equity, Amount | $           $ 5,000                              
Class of Warrant or Right, Exercise Price of Warrants or Rights, Percent of Closing Price per Share         110.00% 110.00%                              
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                                
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                                
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares         $ 3.256                                
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                                
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares           $ 3.372                              
Warrant, Down Round Feature, Increase (Decrease) in Equity, Amount | $         $ 4,000                                
Second Tranche Closing [Member] | Second Tranche Warrants [Member]                                          
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)               64,065                          
Common Stock Warrants [Member] | Tranche Closing Warrants [Member]                                          
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares         $ 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) | $ / shares         $ 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]                                          
Warrants and Rights Outstanding, Term (Year)                   4 years                      
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) | $ / shares           $ 3.52       $ 4.2                      
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) | $ / shares         $ 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) | $ / shares               $ 3.996                          
Proceeds from Issuance or Sale of Equity | $               $ 167,000                          
Second Tranche Closing, Placement Agent Services [Member] | Second Tranche Warrants [Member]                                          
Warrants and Rights Outstanding, Term (Year)               4 years                          
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) | $ / shares               $ 3.795                          
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) | $ / shares           $ 3.372                              
Third Tranche Closing, Placement Agent Services [Member]                                          
Preferred Stock, Shares Outstanding (in shares)                           1,590 1,590     1,590      
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)                           565 565     565      
Fourth Tranche Closing, Placement Agent Services [Member] | Fourth Tranche Investor Warrants [Member]                                          
Proceeds from Issuance or Sale of Equity | $         $ 500,000                                
Conversion of Series A Preferred Stock into Common [Member]                                          
Conversion of Stock, Shares Converted (in shares)                 88                        
Conversion of Stock, Shares Issued (in shares)                 51,504                        
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)                           0              
Series A Preferred Stock [Member]                                          
Preferred Stock, Shares Authorized (in shares)                                       6,000  
Preferred Stock, Shares Issued (in shares)                           403 403     403      
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares                           $ 0.0001 $ 0.0001     $ 0.0001      
Preferred Stock, Convertible, Conversion Ratio                                     588    
Conversion of Stock, Initial Ownership Limit                           9.90% 9.90%     9.90%      
Preferred Stock, Shares Outstanding (in shares)                           403 403     403      
Series A Preferred Stock [Member] | Statera Securities Purchase Agreement [Member]                                          
Stock Issued During Period, Shares, New Issues (in shares)                         360                
Series A Preferred Stock [Member] | Statera and Avenue Securities Purchase Agreement [Member]                                          
Stock Issued During Period, Shares, New Issues (in shares)                       131                  
Series A Preferred Stock [Member] | Minimum [Member]                                          
Conversion of Stock, Ownership Percent                           4.90% 4.90%     4.90%      
Series A Preferred Stock [Member] | Maximum [Member]                                          
Conversion of Stock, Ownership Percent                           19.90% 19.90%     19.90%      
Series B Preferred Stock [Member]                                          
Preferred Stock, Shares Authorized (in shares)                     8,400                    
Preferred Stock, Shares Issued (in shares)                           2,155 2,155     2,155      
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares                     $ 1,000     $ 0.0001 $ 0.0001     $ 0.0001      
Conversion of Stock, Initial Ownership Limit                     4.90%                    
Stock Issued During Period, Shares, New Issues (in shares)                                   0      
Stock Issued During Period, Value, New Issues | $                                   $ 0      
Preferred Stock, Dividend Rate, Percentage                     10.00%                    
Preferred Stock, Convertible, Conversion Price, Percent                     90.00%                    
Preferred Stock, Convertible, Redeemable Price, Percent                     115.00%                    
Maximum Percentage of Net Proceeds from Equity Financing to Redeem Preferred Stock                     25.00%                    
Warrant, Down Round Feature, Increase (Decrease) in Equity, Amount | $                                   $ 0      
Preferred Stock, Shares Outstanding (in shares)                           2,155 2,155     2,155      
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                    
Equity Issuable, Maximum Number of Shares, Tranche One (in shares)                     700                    
Equity Issuable, Maximum Value of Shares, Tranche One | $                     $ 700,000                    
Equity Issuable, Maximum Number of Shares, Tranche Two (in shares)                     700                    
Equity Issuable, Maximum Value of Shares, Tranche Two | $                     $ 700,000                    
Equity Issuable, Maximum Number of Shares, Tranche Three (in shares)                     1,750                    
Equity Issuable, Maximum Value of Shares, Tranche Three | $                     $ 1,750,000                    
Equity Issuable, Maximum Number of Shares, Tranche Four (in shares)                     1,750                    
Equity Issuable, Maximum Value of Shares, Tranche Four | $                     $ 1,750,000                    
Equity Issuable, Maximum Number of Shares, Tranche Five (in shares)                     1,750                    
Equity Issuable, Maximum Value of Shares, Tranche Five | $                     $ 1,750,000                    
Equity Issuable, Maximum Number of Shares, Tranche Six (in shares)                     1,750                    
Equity Issuable, Maximum Value of Shares, Tranche Six | $                     $ 1,750,000                    
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 B Preferred Stock [Member] | Minimum [Member]                                          
Conversion of Stock, Ownership Percent                     4.90%                    
Preferred Stock, Convertible, Conversion Price (in dollars per share) | $ / shares                     $ 1.294                    
Series B Preferred Stock [Member] | Maximum [Member]                                          
Conversion of Stock, Ownership Percent                     19.90%                    
Series C Preferred Stock [Member]                                          
Preferred Stock, Shares Authorized (in shares)     75,000                                    
Preferred Stock, Shares Issued (in shares)                           12,000 12,000     12,000      
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares                           $ 0.0001 $ 0.0001     $ 0.0001      
Conversion of Stock, Initial Ownership Limit     4.90%                                    
Stock Issued During Period, Shares, New Issues (in shares)                                   0      
Stock Issued During Period, Value, New Issues | $                                   $ 0      
Preferred Stock, Dividend Rate, Percentage     6.00%                                    
Preferred Stock, Convertible, Conversion Price, Percent     93.00%                                    
Preferred Stock, Convertible, Redeemable Price, Percent     115.00%                                    
Maximum Percentage of Net Proceeds from Equity Financing to Redeem Preferred Stock     36.00%                                    
Warrant, Down Round Feature, Increase (Decrease) in Equity, Amount | $                                   $ 0      
Preferred Stock, Shares Outstanding (in shares)                           12,000 12,000     12,000      
Preferred Stock, Stated Value | $     $ 1,080                                    
Series C Preferred Stock [Member] | Preferred Purchase Agreement [Member]                                          
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares     $ 1,000                                    
Equity Issuable, Maximum Number of Shares (in shares)     75,000                                    
Equity Issuable, Maximum Number of Shares, Tranche One (in shares)   12,000 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                                    
Proceeds from Issuance or Sale of Equity | $   $ 5,900,000                                      
Equity Issuable, Maximum Aggregate Stated Value | $     $ 3,000,000                                    
Equity Issuable, Minimum Shares Outstanding for First Refusal (in shares)     1,200                                    
Series C Preferred Stock [Member] | Minimum [Member]                                          
Conversion of Stock, Ownership Percent     4.90%                                    
Preferred Stock, Convertible, Conversion Price (in dollars per share) | $ / shares     $ 0.39                                    
Series C Preferred Stock [Member] | Maximum [Member]                                          
Conversion of Stock, Ownership Percent     19.90%