Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Stockholders' Equity and Equity-linked Instruments - Schedule of Preferred Stock (Details)

v3.24.1.1.u2
Note 6 - Stockholders' Equity and Equity-linked Instruments - Schedule of Preferred Stock (Details) - USD ($)
 1 Months Ended 2 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Dec. 22, 2023
Nov. 30, 2023
May 26, 2023
May 05, 2023
Apr. 28, 2023
Apr. 20, 2023
Apr. 19, 2023
Jan. 31, 2023
Dec. 22, 2022
Nov. 30, 2022
Nov. 28, 2022
Nov. 22, 2022
Dec. 22, 2023
May 26, 2023
Jan. 31, 2023
Mar. 31, 2024
Dec. 31, 2023
Aug. 23, 2023
Series AAA (in shares) 22,078 23,656                               22,078 23,656  
Series AAA (in shares) 22,078 23,656                               22,078 23,656  
Series AAA Convertible Preferred Stock [Member]                                        
Conversion Price – At Issuance (in dollars per share)       $ 1.674                                
Series AAA (in dollars per share) $ 1.674                                 $ 1.674    
Stock Issued During Period, Shares, New Issues       5,377                                
Series AAA (in shares) 5,377                                 5,377    
Series AAA (in shares) 3,212,000                                 3,212,000    
Gross Proceeds       $ 5,377,000                                
Series AAA (in shares) 0 0                               0 0  
Series AAA                                   $ 0 $ 0  
Fees       645,000                                
Series AAA (in shares) 5,377 5,377                               5,377 5,377  
Series AAA (in shares) 3,212,000 3,212,000                               3,212,000 3,212,000  
Net Proceeds       $ 4,732,000                                
Conversion Shares – At Issuance (in shares)       3,212,000                                
Placement Agent Warrants (in shares) [1]       466,000                                
Series A A Preferred Stock [Member]                                        
Conversion Price – At Issuance (in dollars per share) [2]                 $ 9.43                      
Preferred Stock, Convertible, Conversion Price (in dollars per share)       $ 9.43                               $ 2.6
Stock Issued During Period, Shares, New Issues                 7,680                      
Gross Proceeds                 $ 7,680,000                      
Fees                 966,000                      
Series AAA (in shares)       7,322                               10,706
Net Proceeds                 $ 6,714,000                      
Conversion Shares – At Issuance (in shares)                 814,000                      
Placement Agent Warrants (in shares) [3]                 114,000                      
Series AA Convertible Preferred Stock [Member]                                        
Series AAA (in dollars per share) $ 1.89 $ 1.89 [4]                               $ 1.89 $ 1.89 [4]  
Series AAA (in shares) 814,000 7,680                               814,000 7,680  
Series AAA (in shares) (139,000) (1,336,000)                               (139,000) (1,336,000)  
Series AA (in shares) (263) (2,926)                                 (3,043,000)  
Series AAA (in shares) 4,491 4,754                               4,491 4,754  
Series AAA (in shares) 2,382,000 2,521,000                               2,382,000 2,521,000  
Conversion of Stock, Shares Converted (in shares) 263 2,926                                 3,043,000  
Series A Preferred Stock [Member]                                        
Conversion Price (in dollars per share)                           $ 12.4            
Preferred Stock, Convertible, Conversion Price (in dollars per share) $ 12.4                                 $ 12.4    
Stock Issued During Period, Shares, New Issues                           5,359       5,359    
Series AAA (in shares) 432,000                                 432,000    
Series AAA (in shares)                           432,000            
Gross Proceeds                           $ 5,359,000            
Series AAA (in shares) (368) (4,551)                               (368) (4,551)  
Series AA (in shares)                                   (30,000) (367,000)  
Fees                           752,000            
Series AAA (in shares) 35,000 65,000                               35,000 65,000  
Conversion of Stock, Shares Converted (in shares)                                   30,000 367,000  
Outstanding (in shares)                                   440 808  
Net Proceeds                           $ 4,607,000            
Outstanding (in shares)                                   440 808  
Placement Agent Warrants (in shares) [5]                           62,000            
Series AAA-2 Convertible Preferred Stock [Member]                                        
Conversion Price – At Issuance (in dollars per share)     $ 1.71                       $ 1.71          
Series AAA (in dollars per share) $ 1.71                                 $ 1.71    
Stock Issued During Period, Shares, New Issues     2,978                                  
Series AAA (in shares) 2,978                                 2,978    
Series AAA (in shares) 1,742,000                                 1,742,000    
Gross Proceeds     $ 2,978,000                                  
Series AAA (in shares) 0 0                               0 0  
Series AAA                                   $ 0 $ 0  
Fees     357,000                                  
Series AAA (in shares) 2,978 2,978                               2,978 2,978  
Series AAA (in shares) 1,742,000 1,742,000                               1,742,000 1,742,000  
Net Proceeds     $ 2,621,000                                  
Conversion Shares – At Issuance (in shares)     1,742,000                       1,742,000          
Placement Agent Warrants (in shares) [1]     253,000                                  
Series AA-2 Convertible Preferred Stock [Member]                                        
Conversion Price – At Issuance (in dollars per share) [2]               $ 10.43                        
Series AAA (in dollars per share) $ 2.09 $ 2.09 [4]                               $ 2.09 $ 2.09 [4]  
Preferred Stock, Convertible, Conversion Price (in dollars per share)                                       $ 10.43
Stock Issued During Period, Shares, New Issues               1,500                        
Series AAA (in shares) 144,000 1,500                               144,000 1,500  
Gross Proceeds               $ 1,500,000                        
Series AAA (in shares) 0 (274,000)                               0 (274,000)  
Series AA (in shares) 0 (1,500)                                 (130,000)  
Fees               130,000                        
Series AAA (in shares) 0 0                               0 0  
Series AAA (in shares) 0 0                               0 0  
Conversion of Stock, Shares Converted (in shares) (0) 1,500                                 130,000  
Net Proceeds               $ 1,370,000                        
Conversion Shares – At Issuance (in shares)               144,000                        
Placement Agent Warrants (in shares) [3]               13,000                        
Series A-2 Preferred Stock [Member]                                        
Conversion Price (in dollars per share)                         $ 13.29              
Preferred Stock, Convertible, Conversion Price (in dollars per share) $ 13.29                                 $ 13.29    
Stock Issued During Period, Shares, New Issues                         1,297         1,297    
Series AAA (in shares) 98,000                                 98,000    
Series AAA (in shares)                         98,000              
Gross Proceeds                         $ 1,297,000              
Series AAA (in shares) 0 (834)                               0 (834)  
Series AA (in shares)                                   0 (63,000)  
Fees                         169,000              
Series AAA (in shares) 35,000 35,000                               35,000 35,000  
Conversion of Stock, Shares Converted (in shares)                                   (0) 63,000  
Outstanding (in shares)                                   463 463  
Net Proceeds                         $ 1,128,000              
Outstanding (in shares)                                   463 463  
Placement Agent Warrants (in shares) [5]                         14,000              
Series AAA and AAA-2 Convertible Preferred Stock [Member]                                        
Stock Issued During Period, Shares, New Issues                             8,355          
Series AAA (in shares) 8,355                                 8,355    
Series AAA (in shares) 4,954,000                                 4,954,000    
Gross Proceeds                             $ 8,355,000          
Series AAA (in shares)   0                                 0  
Fees                             1,002,000          
Series AAA (in shares) 8,355 8,355                               8,355 8,355  
Series AAA (in shares) 4,954,000 4,954,000                               4,954,000 4,954,000  
Net Proceeds                             $ 7,353,000          
Conversion Shares – At Issuance (in shares)     4,954,000                       4,954,000          
Placement Agent Warrants (in shares) [1]                             719,000          
Series AA-3 Convertible Preferred Stock [Member]                                        
Conversion Price – At Issuance (in dollars per share) [2]             $ 9.5                          
Series AAA (in dollars per share) $ 1.9 $ 1.9 [4]                               $ 1.9 $ 1.9 [4]  
Preferred Stock, Convertible, Conversion Price (in dollars per share)                                       9.5
Stock Issued During Period, Shares, New Issues             1,025                          
Series AAA (in shares) 108,000 1,025                               108,000 1,025  
Gross Proceeds             $ 1,025,000                          
Series AAA (in shares) 0 (334,000)                               0 (334,000)  
Series AA (in shares) 0 (634)                                 (432,000)  
Fees             133,000                          
Series AAA (in shares) 391 391                               391 391  
Series AAA (in shares) 206,000 206,000                               206,000 206,000  
Conversion of Stock, Shares Converted (in shares) (0) 634                                 432,000  
Net Proceeds             $ 892,000                          
Conversion Shares – At Issuance (in shares)             108,000                          
Placement Agent Warrants (in shares) [3]             15,000                          
Series A-3 Preferred Stock [Member]                                        
Conversion Price (in dollars per share)                       $ 13.41                
Preferred Stock, Convertible, Conversion Price (in dollars per share) $ 13.41                                 $ 13.41    
Stock Issued During Period, Shares, New Issues                       1,733           1,733    
Series AAA (in shares) 129,000                                 129,000    
Series AAA (in shares)                       129,000                
Gross Proceeds                       $ 1,733,000                
Series AAA (in shares) 0 (1,418)                               0 (1,418)  
Series AA (in shares)                                   0 (106,000)  
Fees                       225,000                
Series AAA (in shares) 23,000 23,000                               23,000 23,000  
Conversion of Stock, Shares Converted (in shares)                                   (0) 106,000  
Outstanding (in shares)                                   315 315  
Net Proceeds                       $ 1,508,000                
Outstanding (in shares)                                   315 315  
Placement Agent Warrants (in shares) [5]                       18,000                
Series AAA Preferred Stock Exchanges [Member]                                        
Series AAA (in dollars per share) $ 1.674                                 $ 1.674    
Series AAA (in shares) 4,011                                 4,011    
Series AAA (in shares) 2,396,000                                 2,396,000    
Series AAA (in shares) (840) (125)                               (840) (125)  
Series AAA                                   $ (502,000) $ (75,000)  
Series AAA (in shares) 3,046 3,886                               3,046 3,886  
Series AAA (in shares) 1,819,000 2,321,000                               1,819,000 2,321,000  
Series AA-4 Convertible Preferred Stock [Member]                                        
Conversion Price – At Issuance (in dollars per share) [2]           $ 9.28                            
Series AAA (in dollars per share) $ 1.86 $ 1.86 [4]                               $ 1.86 $ 1.86 [4]  
Preferred Stock, Convertible, Conversion Price (in dollars per share)                                       9.28
Stock Issued During Period, Shares, New Issues           1,026                            
Series AAA (in shares) 109,000 1,026                               109,000 1,026  
Gross Proceeds           $ 1,026,000                            
Series AAA (in shares) 0 (275,000)                               0 (275,000)  
Series AA (in shares) 0 (511)                                 (443,000)  
Fees           133,000                            
Series AAA (in shares) 515 515                               515 515  
Series AAA (in shares) 277,000 277,000                               277,000 277,000  
Conversion of Stock, Shares Converted (in shares) (0) 511                                 443,000  
Net Proceeds           $ 893,000                            
Conversion Shares – At Issuance (in shares)           111,000                            
Placement Agent Warrants (in shares) [3]           16,000                            
Series A-4 Preferred Stock [Member]                                        
Conversion Price (in dollars per share)                     $ 7.6                  
Preferred Stock, Convertible, Conversion Price (in dollars per share) $ 7.6                                 $ 7.6    
Stock Issued During Period, Shares, New Issues                     1,934             1,934    
Series AAA (in shares) 254,000                                 254,000    
Series AAA (in shares)                     254,000                  
Gross Proceeds                     $ 1,934,000                  
Series AAA (in shares) (75) (1,383)                               (75) (1,383)  
Series AA (in shares)                                   (10,000) (182,000)  
Fees                     251,000                  
Series AAA (in shares) 62,000 72,000                               62,000 72,000  
Conversion of Stock, Shares Converted (in shares)                                   10,000 182,000  
Outstanding (in shares)                                   476 551  
Net Proceeds                     $ 1,683,000                  
Outstanding (in shares)                                   476 551  
Placement Agent Warrants (in shares) [5]                     36,000                  
Series AAA-2 Preferred Stock Exchanges [Member]                                        
Series AAA (in dollars per share) $ 1.71                                 $ 1.71    
Series AAA (in shares) 2,356                                 2,356    
Series AAA (in shares) 1,378,000                                 1,378,000    
Series AAA (in shares) 0 (100)                               0 (100)  
Series AAA                                   $ 0 $ (58,000)  
Series AAA (in shares) 2,256 2,256                               2,256 2,256  
Series AAA (in shares) 1,320,000 1,320,000                               1,320,000 1,320,000  
Series AA-5 Convertible Preferred Stock [Member]                                        
Conversion Price – At Issuance (in dollars per share) [2]         $ 10.6                     $ 10.6        
Series AAA (in dollars per share) $ 2.12 $ 2.12 [4]                               $ 2.12 $ 2.12 [4]  
Preferred Stock, Convertible, Conversion Price (in dollars per share)                                       $ 10.6
Stock Issued During Period, Shares, New Issues         550                              
Series AAA (in shares) 58,000 550                               58,000 550  
Gross Proceeds         $ 550,000                              
Series AAA (in shares) 0 0                               0 0  
Series AA (in shares) 0 0                                 (201,000)  
Fees         72,000                              
Series AAA (in shares) 550 550                               550 550  
Series AAA (in shares) 259,000 259,000                               259,000 259,000  
Conversion of Stock, Shares Converted (in shares) (0) (0)                                 201,000  
Net Proceeds         $ 478,000                              
Conversion Shares – At Issuance (in shares)         52,000                     52,000        
Placement Agent Warrants (in shares) [3]         7,000                              
Series A-5 Preferred Stock [Member]                                        
Conversion Price (in dollars per share)                   $ 11.09                    
Preferred Stock, Convertible, Conversion Price (in dollars per share) $ 11.09                                 $ 11.09    
Stock Issued During Period, Shares, New Issues                   2,299               2,299    
Series AAA (in shares) 207,000                                 207,000    
Series AAA (in shares)                   207,000             207,000      
Gross Proceeds                   $ 2,299,000                    
Series AAA (in shares) (32) (1,487)                               (32) (1,487)  
Series AA (in shares)                                   (3,000) (134,000)  
Fees                   299,000                    
Series AAA (in shares) 70,000 73,000                               70,000 73,000  
Conversion of Stock, Shares Converted (in shares)                                   3,000 134,000  
Outstanding (in shares)                                   780 812  
Net Proceeds                   $ 2,000,000                    
Outstanding (in shares)                                   780 812  
Placement Agent Warrants (in shares) [5]                   30,000                    
Series AAA and AAA-2 Preferred Stock Exchanges [Member]                                        
Series AAA (in shares) 6,367                                 6,367    
Series AAA (in shares) 3,774,000                                 3,774,000    
Series AAA (in shares) (840) (225)                               (840) (225)  
Series AAA                                   $ (502,000) $ (133,000)  
Series AAA (in shares) 5,302 6,142                               5,302 6,142  
Series AAA (in shares) 3,139,000 3,641,000                               3,139,000 3,641,000  
Series AA, AA-2, AA-3, and AA-4 Convertible Preferred Stock [Member]                                        
Stock Issued During Period, Shares, New Issues                               11,781        
Series AAA (in shares) 1,233,000 11,781                               1,233,000 11,781  
Gross Proceeds                               $ 11,781,000        
Series AAA (in shares) (139,000) (2,219,000)                               (139,000) (2,219,000)  
Series AA (in shares) (263) (5,571)                                 (4,249,000)  
Fees                               1,434,000        
Series AAA (in shares) 5,947 6,210                               5,947 6,210  
Series AAA (in shares) 3,124,000 3,263,000                               3,124,000 3,263,000  
Conversion of Stock, Shares Converted (in shares) 263 5,571                                 4,249,000  
Net Proceeds                               $ 10,347,000        
Conversion Shares – At Issuance (in shares)         1,229,000                     1,229,000        
Placement Agent Warrants (in shares) [3]                               165,000        
Series A Preferred Offerings [Member]                                        
Stock Issued During Period, Shares, New Issues                                 12,622 12,622    
Series AAA (in shares) 1,120,000                                 1,120,000    
Series AAA (in shares)                   1,120,000             1,120,000      
Gross Proceeds                                 $ 12,622,000      
Series AAA (in shares) (475) (9,673)                               (475) (9,673)  
Series AA (in shares)                                   (43,000) (852,000)  
Fees                                 1,696,000      
Series AAA (in shares) 225,000 268,000                               225,000 268,000  
Conversion of Stock, Shares Converted (in shares)                                   43,000 852,000  
Outstanding (in shares)                                   2,474 2,949  
Net Proceeds                                 $ 10,926,000      
Outstanding (in shares)                                   2,474 2,949  
Placement Agent Warrants (in shares) [5]                                 160,000      
Series Preferred AAA [Member]                                        
Series AAA (in shares) 14,722                                 14,722    
Series AAA (in shares) 8,728,000                                 8,728,000    
Series AAA (in shares) (840) (225)                               (840) (225)  
Series AAA                                   $ (502,000) $ (133,000)  
Series AAA (in shares) 13,657 14,497                               13,657 14,497  
Series AAA (in shares) 8,093,000 8,595,000                               8,093,000 8,595,000  
[1] Issued upon final closing of the Series AAA Preferred Stock offering, effective as of the respective closing dates.
[2] The Conversion price for Series AA Preferred stock outstanding as of August 23, 2023, totaling 10,706 shares of Series AA Preferred stock, was adjusted to $2.60 as a result of the Series AA Down Round Feature described below. The Conversion price for Series AA Preferred stock outstanding as of November 30, 2023, totaling 7,322 shares of Series AA Preferred stock, was adjusted as described in the table below as a result of the Series AA Down Round Feature described below.
[3] Issued on May 26, 2023, effective as of the applicable closing date, upon final closing of the Series AA Preferred Stock offering.
[4] The Conversion prices for the Series AA Preferred stock outstanding as of November 30, 2023, totaling 7,322 shares of Series AA Preferred stock, were adjusted to the conversion prices shown in the table above, as a result of the Series AA Down Round Feature described below. The original conversion prices for the Series AA Preferred, as of the respective issuance dates, were as follows: Series AA - $9.43; Series AA-2 - $10.43; Series AA-3 - $9.50; Series AA-4 - $9.28; Series AA-5 - $10.60.
[5] Issued on May 26, 2023, effective as of the applicable closing date, upon final closing of the Series A Preferred Stock offering