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Note 3 - Financial Instruments (Tables)
3 Months Ended
Mar. 31, 2024
Notes Tables  
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]
   

As of March 31, 2024

 
   

Adjusted

   

Unrealized

   

Unrealized

   

Market

 
   

Cost

   

Gains

   

Losses

   

Value

 

Level 1:

                               

Money Market Funds

  $ 2,219       -     $ -     $ 2,219  

Certificate of Deposits

    5,000       -       -       5,000  

Total Financial Assets

  $ 7,219     $ -     $ -     $ 7,219  
   

As of December 31, 2023

 
   

Adjusted

   

Unrealized

   

Unrealized

   

Market

 
   

Cost

   

Gains

   

Losses

   

Value

 

Level 1:

                               

Money Market Funds

    1,793       -       -       1,793  

Certificate of Deposits

    7,500       -       -       7,500  

Total Financial Assets

  $ 9,293     $ -     $ -     $ 9,293  
Fair Value, Liabilities Measured on Recurring Basis [Table Text Block]

Level 3:

 

March 31,

2024

   

December 31,

2023

 

Fair value at inception or the beginning of the period

  $ (19,703 )   $ (7,717 )

Change in fair value of warrant liabilities

    4,179       (11,986 )

Fair value as of March 31, 2024

  $ (15,524 )   $ (19,703 )
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
   

As of

March 31,

2024

   

As of

December 31,

2023

 

Expected stock price volatility

    271

%

    143

%

Risk-free interest rate

    4.28

%

    3.85

%

Dividends yield

    0

%

    0

%

Expected life of warrants (years)

    4.25       4.50  

Exercise price

  $ 1.45     $ 1.45