General form of registration statement for all companies including face-amount certificate companies

Note 11 - Equity (Details Textual)

v3.24.3
Note 11 - Equity (Details Textual)
3 Months Ended 6 Months Ended 12 Months Ended
Apr. 02, 2024
shares
Dec. 31, 2023
USD ($)
$ / shares
shares
Oct. 16, 2023
shares
Aug. 29, 2023
$ / shares
shares
Jul. 08, 2023
shares
May 01, 2023
$ / shares
shares
Mar. 15, 2023
USD ($)
shares
Feb. 23, 2023
$ / shares
shares
Feb. 16, 2023
USD ($)
$ / shares
shares
Nov. 23, 2022
Sep. 15, 2022
USD ($)
$ / shares
shares
Aug. 17, 2022
USD ($)
shares
Jul. 05, 2022
shares
Jun. 30, 2024
USD ($)
$ / shares
shares
Jun. 30, 2023
USD ($)
Jun. 30, 2024
USD ($)
$ / shares
shares
Jun. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
$ / shares
shares
Dec. 31, 2022
USD ($)
$ / shares
shares
Jun. 15, 2023
$ / shares
shares
Feb. 17, 2023
$ / shares
shares
Aug. 16, 2022
$ / shares
shares
Jul. 04, 2022
$ / shares
Dec. 31, 2021
$ / shares
Proceeds from Issuance or Sale of Equity | $                               $ 945,000 $ 1,225,000 $ 4,643,000 $ 290,000          
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares   $ 2.07                       $ 2.19   $ 2.19   $ 2.07 $ 2.26         $ 7.5
Stock Repurchased and Retired During Period, Shares (in shares)     4,217                                          
Shares Authorized (in shares)   2,500,000,000                       2,500,000,000   2,500,000,000   2,500,000,000            
Common Stock, Shares Authorized (in shares)   2,470,000,000                       2,470,000,000   2,470,000,000   2,470,000,000 2,470,000,000          
Preferred Stock, Shares Authorized (in shares)   30,000,000                       30,000,000   30,000,000   30,000,000 30,000,000          
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Grant Date Fair Value | $                               $ 0 0   $ 692,000          
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value | $   $ 0                       $ 0   0   $ 0 $ 0          
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount | $   434,000                       317,000   $ 317,000   $ 434,000            
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) 106,000       3,148,288                     0   795,916            
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) 5 years       5 years                         5 years 5 years          
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares) 106,000       362,584                     187,739   246,883            
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) 3 years       3 years                                      
Share-Based Payment Arrangement, Option [Member]                                                
Share-Based Payment Arrangement, Expense | $                           $ 58,000 $ 74,000 $ 117,000 $ 148,000 $ 295,000 $ 60,000          
Reverse Stock Split [Member]                                                
Stockholders' Equity Note, Stock Split, Conversion Ratio                   750                            
Conversion of Series B Preferred Stock to Common Stock [Member]                                                
Preferred Stock, Mandatory Conversion Feature, Offering Proceeds Threshold | $   $ 1,000                               $ 1,000            
Preferred Stock, Convertible, Conversion Ratio   1                               1            
Conversion of Stock, Shares Converted (in shares)   14,578,833                           14,578,833                
Preferred Stock, Mandatory Conversion Feature, Company Valuation | $   $ 18,000                               $ 18,000            
Related Party [Member] | Consulting Fees [Member]                                                
Shares Issued, Price Per Share (in dollars per share) | $ / shares           $ 0.0041                                    
Stock Issued During Period, Shares, Issued for Services (in shares)           284,964                                    
August 2022 Securities Purchase Agreement Warrants [Member]                                                
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                       13,333                        
Series C Preferred Unit Warrants [Member]                                                
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)   1   1                   1   1   1            
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares   $ 2.56   $ 2.56                   $ 2.56   $ 2.56   $ 2.56            
Warrants and Rights Outstanding, Term (Year)   3 years                       3 years   3 years   3 years            
Warrants or Rights Issued (in shares)                               836,531   759,863            
Noncash Warrants Issued (in shares)                                   781,250            
Tranche A Warrants [Member]                                                
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)   526,749                               526,749            
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares   $ 0.75                               $ 0.75         $ 0.75  
Class of Warrant or Right, Exercise Price, Purchase Price Numerator | $   $ 50,000                               $ 50,000            
Tranche B Warrants [Member]                                                
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)   262,051                               262,051            
Class of Warrant or Right, Exercise Price, Purchase Price Numerator | $   $ 150,000                               $ 150,000            
Convertible Debt and Stock Warrants [Member]                                                
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                                           198,482    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares                                           $ 3    
WPC Warrants [Member]                                                
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                                         123,333      
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares                                         $ 0.00473      
Series A Warrants [Member]                                                
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                                       6,048,456        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares                                       $ 0.01        
Warrants and Rights Outstanding, Term (Year)                                       5 years        
Series A Preferred Stock [Member]                                                
Stock Issued During Period, Shares, New Issues (in shares)                         3,198,421                      
Preferred Stock, Shares Authorized (in shares)                         30,000,000   30,000,000            
Series B Preferred Stock [Member]                                                
Stock Issued During Period, Shares, New Issues (in shares)             14,578,833 10,799,136                                
Shares Issued, Price Per Share (in dollars per share) | $ / shares               $ 0.1852                                
Proceeds from Issuance of Preferred Stock and Preference Stock | $             $ 2,700,000                                  
Payments of Stock Issuance Costs | $             $ 92,000                                  
Preferred Stock, Shares Authorized (in shares)   30,000,000                           30,000,000 30,000,000          
Series C Preferred Stock [Member]                                                
Proceeds from Issuance or Sale of Equity | $   $ 1,969,000                           $ 1,070,000                
Payments of Stock Issuance Costs | $   $ 67,000                           $ 125,000                
Units Issued During Period, New Issues (in shares)   1,538,134   7,812,500                       836,085                
Preferred Stock, Mandatory Conversion Feature, Offering Proceeds Threshold | $   $ 2,000                               $ 2,000            
Preferred Stock, Shares Authorized (in shares)                                      
Preferred Stock, Mandatory Conversion Feature, Company Valuation | $   $ 65,000                               $ 65,000            
Series C Preferred Stock [Member] | Series C Preferred Unit Warrants [Member]                                                
Class of Warrant or Right, Combined Purchase Price (in dollars per share) | $ / shares       $ 1.28                                        
Securities Purchase Agreement [Member]                                                
Stock Issued During Period, Shares, New Issues (in shares)                 32,536,386   51,282                          
Proceeds from Issuance or Sale of Equity | $                 $ 133,000   $ 250,000                          
Shares Issued, Price Per Share (in dollars per share) | $ / shares                 $ 0.0041   $ 4.87                          
Securities Purchase Agreement [Member] | Series A Preferred Stock [Member]                                                
Stock Issued During Period, Shares, New Issues (in shares)                       10,000,000                        
Proceeds from Issuance or Sale of Equity | $                       $ 40,000