Quarterly report pursuant to Section 13 or 15(d)

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

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Note 6 - Stockholders' Equity and Equity-linked Instruments (Details Textual)
 1 Months Ended 6 Months Ended 12 Months Ended
Sep. 07, 2023
Jul. 31, 2024
USD ($)
shares
Jun. 30, 2024
USD ($)
$ / shares
shares
Jun. 30, 2024
USD ($)
$ / shares
shares
Dec. 31, 2023
USD ($)
$ / shares
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         5,000,000  
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares     $ 0.001 $ 0.001 $ 0.001            
Total Capital, Shares Authorized     110,000,000 110,000,000              
Common Stock, Shares Authorized (in shares)     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            
Preferred Stock, Stated Value | $     $ 1,000 $ 1,000              
Outstanding (in shares)     22,858 22,858 23,656            
Subsequent Event [Member]                      
Common Stock Dividends, Shares   923,043                  
Fair Value of Shares Issued | $   $ 729,000                  
Conversion of Series A and AA to Series AAA [Member]                      
Conversion of Stock, Shares Converted       6,367              
Conversion of Stock, Shares Issued       6,367              
Series A A Preferred Stock [Member]                      
Outstanding (in shares)     4,391 4,391       7,322 10,706    
Preferred Stock, Convertible, Conversion Price | $ / shares                 $ 2.6    
Deemed Dividend on Preferred Stock | $         $ 7,567,000            
Fair Value of Shares Issued | $ [1]       $ 662,000              
Series A Preferred Offerings [Member] | Subscription Agreements [Member]                      
Preferred Stock Dividends, Percentage of Common Shares     20.00% 20.00%              
Warrants Issued With Placement Agent Agreement [Member]                      
Warrants and Rights Outstanding, Term     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%              
Warrants Issued With Placement Agent Agreement [Member] | Measurement Input, Risk Free Interest Rate [Member]                      
Warrants and Rights Outstanding, Measurement Input     0.0421 0.0421 0.0384   0.0387       0.0388
Warrants Issued With Placement Agent Agreement [Member] | Measurement Input, Price Volatility [Member]                      
Warrants and Rights Outstanding, Measurement Input     0.98 0.98 0.98   0.98       0.95
Warrants Issued With Placement Agent Agreement [Member] | Minimum [Member] | Measurement Input, Expected Term [Member]                      
Warrants and Rights Outstanding, Measurement Input     3.89 3.89 4.5           5
Warrants Issued With Placement Agent Agreement [Member] | Maximum [Member] | Measurement Input, Expected Term [Member]                      
Warrants and Rights Outstanding, Measurement Input     4.47 4.47 5   5       5.19
Placement Agent Warrants With Series A-2 Preferred Stock [Member]                      
Class of Warrant or Right, Exchanged During Period (in shares)     88,403 88,403              
Stock Issued During Period, Shares, Warrant Exchange (in shares)       199,778              
Shares Issued, Price Per Share (in dollars per share) | $ / shares     $ 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              
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              
New Placement Agent Warrants [Member]                      
Class of Warrant or Right, Exchanged During Period (in shares)     347,428 347,428              
Class of Warrant or Right, Exchanged During Period, Exercise Price (in dollars per share) | $ / shares     $ 1.674 $ 1.674              
Series AA Additional Investment Right [Member] | Measurement Input, Share Price [Member]                      
Warrants and Rights Outstanding, Measurement Input     0.86 0.86              
Series AA Additional Investment Right [Member] | Minimum [Member] | Measurement Input, Conversion Price [Member]                      
Warrants and Rights Outstanding, Measurement Input     1.886 1.886              
Series AA Additional Investment Right [Member] | Minimum [Member] | Measurement Input, Risk Free Interest Rate [Member]                      
Warrants and Rights Outstanding, Measurement Input     0.0513 0.0513              
Series AA Additional Investment Right [Member] | Minimum [Member] | Measurement Input, Expected Term [Member]                      
Warrants and Rights Outstanding, Measurement Input     0.42 0.42              
Series AA Additional Investment Right [Member] | Minimum [Member] | Measurement Input, Price Volatility [Member]                      
Warrants and Rights Outstanding, Measurement Input     0.79 0.79              
Series AA Additional Investment Right [Member] | Maximum [Member] | Measurement Input, Conversion Price [Member]                      
Warrants and Rights Outstanding, Measurement Input     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              
Series AA Additional Investment Right [Member] | Maximum [Member] | Measurement Input, Expected Term [Member]                      
Warrants and Rights Outstanding, Measurement Input     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              
Series AA Preferred Additional Investment Rights [Member]                      
Class of Warrant or Right, Exchanged During Period (in shares)     3,215,232 3,215,232   642,962          
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease) | $     $ 294,000                
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.