Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Stockholders' Equity and Equity-linked Instruments (Details Textual)

v3.24.3
Note 6 - Stockholders' Equity and Equity-linked Instruments (Details Textual)
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2023
USD ($)
Sep. 07, 2023
Oct. 31, 2024
USD ($)
Sep. 30, 2024
USD ($)
$ / shares
shares
Jul. 31, 2024
USD ($)
shares
Jun. 30, 2024
USD ($)
shares
Dec. 31, 2023
$ / shares
shares
Sep. 30, 2024
USD ($)
$ / shares
shares
Jun. 30, 2024
USD ($)
shares
Sep. 30, 2023
USD ($)
Sep. 30, 2024
USD ($)
$ / shares
shares
Sep. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
$ / shares
shares
Aug. 31, 2024
shares
May 31, 2024
shares
Dec. 22, 2023
Nov. 30, 2023
shares
Aug. 23, 2023
$ / shares
shares
May 29, 2023
shares
May 26, 2023
Preferred Stock, Shares Authorized (in shares)       10,000,000     10,000,000 10,000,000     10,000,000   10,000,000           5,000,000  
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares       $ 0.001     $ 0.001 $ 0.001     $ 0.001   $ 0.001              
Total Capital, Shares Authorized       110,000,000       110,000,000     110,000,000                  
Common Stock, Shares Authorized (in shares)       400,000,000     400,000,000 400,000,000     400,000,000   400,000,000           100,000,000  
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares       $ 0.001     $ 0.001 $ 0.001     $ 0.001   $ 0.001              
Preferred Stock, Stated Value | $       $ 1,000       $ 1,000     $ 1,000                  
Preferred Stock, Shares Outstanding       20,592     23,656 20,592     20,592   23,656              
Deemed Dividend on Preferred Stock | $               $ (0)   $ 6,446,000   $ 6,446,000                
Net Proceeds | $                     $ 37,562,000                  
Common Stock Dividends, Shares         1,168,493                              
Fair Value Shares Issued (1) | $         $ 1,589,000                              
Measurement Input, Risk Free Interest Rate [Member]                                        
Warrants and Rights Outstanding, Measurement Input       0.0358     0.0384 0.0358     0.0358   0.0384     0.0387       0.0388
Measurement Input, Expected Term [Member]                                        
Warrants and Rights Outstanding, Measurement Input                               5        
Measurement Input, Price Volatility [Member]                                        
Warrants and Rights Outstanding, Measurement Input       0.98     0.98 0.98     0.98   0.98     0.98       0.95
Conversion of Series A and AA to Series AAA [Member]                                        
Conversion of Stock, Shares Converted                     6,367                  
Converted to Common stock (in shares)                     6,367                  
Minimum [Member] | Measurement Input, Expected Term [Member]                                        
Warrants and Rights Outstanding, Measurement Input       3     4.5 3     3   4.5             5
Maximum [Member] | Measurement Input, Expected Term [Member]                                        
Warrants and Rights Outstanding, Measurement Input       5     5 5     5   5             5.19
Series AAA-3 & AAA-4 Junior Subscription Agreements [Member]                                        
Stock Issued During Period, Shares, New Issues       1,096                                
Proceeds from Issuance or Sale of Equity | $       $ 1,096,000                                
Series A A Preferred Stock [Member]                                        
Preferred Stock, Shares Outstanding       3,699       3,699     3,699           7,322 10,706    
Preferred Stock, Convertible, Conversion Price | $ / shares                                   $ 2.6    
Deemed Dividend on Preferred Stock | $ $ 6,446,000                       $ 6,446,000              
Net Proceeds | $                     $ 6,714,000                  
Fair Value Shares Issued (1) | $ [1]               $ 216,000 $ 661,000                      
Series AAA-3 Junior Preferred Stock [Member]                                        
Preferred Stock, Shares Outstanding       697       697     697                  
Net Proceeds | $                     $ 613,000                  
Series AAA-3 Junior Preferred Stock [Member] | Series AAA-3 & AAA-4 Junior Subscription Agreements [Member]                                        
Stock Issued During Period, Shares, New Issues             4,011                          
Series AAA-4 Junior Preferred Stock [Member]                                        
Preferred Stock, Shares Outstanding [2]       399       399     399                  
Net Proceeds | $ [2]                     $ 351,000                  
Series AAA-4 Junior Preferred Stock [Member] | Subsequent Event [Member]                                        
Net Proceeds | $     $ 300,000                                  
Series AAA-4 Junior Preferred Stock [Member] | Series AAA-3 & AAA-4 Junior Subscription Agreements [Member]                                        
Stock Issued During Period, Shares, New Issues                         2,356              
Series A Preferred Offerings [Member] | Subscription Agreements [Member]                                        
Preferred Stock Dividends, Percentage of Common Shares       20.00%       20.00%     20.00%                  
Warrants Issued With Placement Agent Agreement [Member]                                        
Warrants and Rights Outstanding, Term       5 years       5 years     5 years                  
Class of Warrants and Rights, Number of Securities Called by Warrants or Rights, Percentage of Total Common Stock Issuable Upon Conversion of Preferred Shares       14.50%       14.50%     14.50%                  
Placement Agent Warrants With Series A-2 Preferred Stock [Member]                                        
Class of Warrant or Right, Exchanged During Period (in shares)       88,403       88,403     88,403                  
Stock Issued During Period, Shares, Warrant Exchange (in shares)                     199,778                  
Shares Issued, Price Per Share | $ / shares       $ 1.71       $ 1.71     $ 1.71                  
Placement Agent Warrants With Series A-2 Preferred Stock [Member] | Minimum [Member]                                        
Class of Warrant or Right, Exchanged During Period, Exercise Price (in dollars per share) | $ / shares       7.6       7.6     7.6                  
Placement Agent Warrants With Series A-2 Preferred Stock [Member] | Maximum [Member]                                        
Class of Warrant or Right, Exchanged During Period, Exercise Price (in dollars per share) | $ / shares       $ 13.41       $ 13.41     $ 13.41                  
New Placement Agent Warrants [Member]                                        
Class of Warrant or Right, Exchanged During Period (in shares)       347,428       347,428     347,428                  
Class of Warrant or Right, Exchanged During Period, Exercise Price (in dollars per share) | $ / shares       $ 1.674       $ 1.674     $ 1.674                  
Series AAA-3 and AAA-4 Junior Preferred Stock Warrants [Member] | Series AAA-3 & AAA-4 Junior Subscription Agreements [Member]                                        
Class of Warrant or Right, Exchanged During Period, Exercise Price (in dollars per share) | $ / shares       $ 1       $ 1     $ 1                  
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right       1,000       1,000     1,000                  
Class of Warrant or Right, Issued During Period, Purchase Price | $ / shares       $ 1,000                                
Series AA Preferred Additional Investment Rights [Member]                                        
Class of Warrant or Right, Exchanged During Period (in shares)       3,336,293   3,215,232   3,336,293 3,215,232   3,336,293     667,289 642,962          
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease) | $       $ 70,000   $ 294,000                            
Series AA Additional Investment Right [Member] | Measurement Input, Share Price [Member]                                        
Warrants and Rights Outstanding, Measurement Input       0.72       0.72     0.72                  
Series AA Additional Investment Right [Member] | Minimum [Member] | Measurement Input, Conversion Price [Member]                                        
Warrants and Rights Outstanding, Measurement Input       1.856       1.856     1.856                  
Series AA Additional Investment Right [Member] | Minimum [Member] | Measurement Input, Risk Free Interest Rate [Member]                                        
Warrants and Rights Outstanding, Measurement Input       0.0464       0.0464     0.0464                  
Series AA Additional Investment Right [Member] | Minimum [Member] | Measurement Input, Expected Term [Member]                                        
Warrants and Rights Outstanding, Measurement Input       0.42       0.42     0.42                  
Series AA Additional Investment Right [Member] | Minimum [Member] | Measurement Input, Price Volatility [Member]                                        
Warrants and Rights Outstanding, Measurement Input       0.68       0.68     0.68                  
Series AA Additional Investment Right [Member] | Maximum [Member] | Measurement Input, Conversion Price [Member]                                        
Warrants and Rights Outstanding, Measurement Input       13.25       13.25     13.25                  
Series AA Additional Investment Right [Member] | Maximum [Member] | Measurement Input, Risk Free Interest Rate [Member]                                        
Warrants and Rights Outstanding, Measurement Input       0.0536       0.0536     0.0536                  
Series AA Additional Investment Right [Member] | Maximum [Member] | Measurement Input, Expected Term [Member]                                        
Warrants and Rights Outstanding, Measurement Input       0.92       0.92     0.92                  
Series AA Additional Investment Right [Member] | Maximum [Member] | Measurement Input, Price Volatility [Member]                                        
Warrants and Rights Outstanding, Measurement Input       0.91       0.91     0.91                  
Reverse Stock Split [Member]                                        
Stockholders' Equity Note, Stock Split, Conversion Ratio   20                                    
[1] Fair valued based on the closing price of the Company’s common stock on the respective common stock dividend payment date.
[2] A portion of the proceeds received subsequent to September 30, 2024. Receivable totaling $300,000 included in additional paid in capital as of September 30, 2024.