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Note 11 - Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2024
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

Description

 

Level

  

September 30, 2024

  

December 31, 2023

 

Assets:

     

(Unaudited)

     

Money Market Account

  1  $481  $3,874 
             

Liabilities:

            

Warrant liabilities (Note 9)

  3  $1,902  $17 

Convertible note payable - Streeterville (Note 7)

  3  $3,050  $9,161 

Convertible note payable - Anson (Note 7)

  3  $2,985  $ 
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
  

September 30,

  

September 30,

 
  

2024

  

2023

 

Stock price on valuation date

  *  $2.60 

Time to expiration

  *   0.59 

Note market interest rate

  *   8.9%

Equity volatility

  *   90.0%

Volume volatility

  *   365.0%

Risk-free rate

  *   5.52%

Probability of default

  *   3.2%
  

September 30,

  

2024

Stock price on valuation date

$

1.69

Time to expiration

 

1.12

Note market interest rate

 

12.5%

Equity volatility

 

122.0%

Risk-free rate

 

3.94%

Probability of default

 

33.6%

  

September 30,

 
  

2024

  

2023

 

Stock price on valuation date

 $1.69  $6.60 

Exercise price per share

 $3.55  $115.00 

Expected life

  4.84   3.15 

Volatility

  129.8%  175.1%

Risk-free rate

  3.6%  5.3%

Dividend yield

  0.0%  0.0%

Fair value of warrants

 $1.40  $7.93 
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

Fair value of the Note as of December 31, 2023

 $9,161 

Conversions and repayments of principal and interest (cash)

  (2,300)

Conversions and repayments of principal and interest (shares)

  (400)

Fair value adjustment through earnings

  318 

Fair value of the Note as of March 31, 2024

  6,779 

Fair value adjustment through earnings

  23 

Default penalty

  849 

Fair value of the Note as of June 30, 2024

 $7,651 

Conversions and repayments of principal and interest (cash)

  (2,500)

Fair value adjustment through earnings

  (2,101)

Fair value of the Note as of September 30, 2024

 $3,050 
     

Convertible note payable - current portion

 $3,050 

Convertible note payable, net of current portion

 $ 

Fair value of the Note as of December 31, 2022

 $10,525 

Fair value adjustment through earnings

  1,770 

Fair value adjustment through accumulated other comprehensive loss

  (106)

Fair value of the Note as of March 31, 2023

  12,189 

Conversions and repayments of principal and interest (cash)

  (88)

Conversions and repayments of principal and interest (shares)

  (200)

Fair value adjustment through earnings

  663 

Fair value adjustment through accumulated other comprehensive loss

  128 

Fair value of the Note as of June 30, 2023

 $12,692 

Conversions and repayments of principal and interest (cash)

  (2,200)

Conversions and repayments of principal and interest (shares)

  (782)

Fair value adjustment through earnings

  359 

Fair value of the Note as of September 30, 2023

 $10,069 
     

Convertible note payable - current portion

 $10,069 

Convertible note payable, net of current portion

 $ 

Fair value of the Note at issuance

 $2,941 

Conversions and repayments of principal and interest (shares)

  (702)

Fair value adjustment through earnings

  746 

Fair value of the Note as of September 30, 2024

 $2,985 
     

Convertible note payable - current portion

 $ 

Convertible note payable, net of current portion

 $2,985 

Balance as of December 31, 2023

 $17 

Loss upon re-measurement

  9 

Balance as of March 31, 2024

  26 

Gain upon re-measurement

  (18)

Balance as of June 30, 2024

 $8 

Initial recognition of issuance of warrants

  2,059 

Gain upon re-measurement

  (165)

Balance as of September 30, 2024

 $1,902 

Balance as of December 31, 2022

 $37 

Gain upon re-measurement

  (12)

Balance as of March 31, 2023

  25 

Loss upon re-measurement

  11 

Balance as of June 30, 2023

 $36 

Loss upon re-measurement

  (26)

Balance as of September 30, 2023

 $10