Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Fair Value Measurements (Tables)

v3.23.1
Note 4 - Fair Value Measurements (Tables)
3 Months Ended
Mar. 31, 2023
Notes Tables  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
   

October 2022

   

January 2023

         
   

Warrants

   

Warrants

   

Total

 

Fair value of warrants outstanding as of December 31, 2022

  $ 2,609     $     $ 2,609  

Fair value of warrants at issuance as of January 31, 2023

          2,235       2,235  

Change in fair value of warrants

    1,462       (584 )     878  

Fair value of warrants outstanding as of March 31, 2023

  $ 4,071     $ 1,651     $ 5,722  
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
   

March 31,

   

December 31,

 
   

2023

   

2022

 
   

(Black-Scholes

   

(Monte Carlo

 
   

model)

   

simulation)

 

Stock price

  $ 1.17     $ 1.16  

Risk-free interest rate

    3.60 %     4.02 %

Expected dividend yield

           

Expected term in years

    4.53       4.78  

Expected volatility

    137 %     93 %
            January 31,  
            2023  
   

March 31,

   

(Initial

 
   

2023

   

measurement)

 

Stock price

  $ 1.17     $ 1.38  

Risk-free interest rate

    3.81 %     3.90 %

Expected dividend yield

           

Expected term in years

    2.84       3.00  

Expected volatility

    164 %     160 %