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

Note 9 - Equity (Details Textual)

v3.24.3
Note 9 - Equity (Details Textual)
 3 Months Ended 6 Months Ended 12 Months Ended
Apr. 02, 2024
shares
Dec. 31, 2023
USD ($)
$ / shares
shares
Aug. 29, 2023
$ / shares
shares
Jul. 08, 2023
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
Mar. 15, 2024
$ / shares
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
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                
Shares, Issued (in shares)                     195,313  
Shares To Be Issued (in shares)                     234,735  
Share-Based Payment Arrangement, Option [Member]                        
Share-Based Payment Arrangement, Expense | $         $ 58,000 $ 74,000 $ 117,000 $ 148,000 $ 295,000 $ 60,000    
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          
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      
Series A Performance Warrants [Member]                        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares                     $ 0.01  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                     432,034  
Series C Preferred Stock [Member]                        
Units Issued During Period, New Issues (in shares)   1,538,134 7,812,500       836,085          
Proceeds from Issuance or Sale of Equity | $   $ 1,969,000         $ 1,070,000          
Payments of Stock Issuance Costs | $   67,000         $ 125,000          
Preferred Stock, Mandatory Conversion Feature, Offering Proceeds Threshold | $   $ 2,000             $ 2,000      
Preferred Stock, Shares Authorized (in shares)              
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