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Note 8 - Outstanding Warrants (Tables)
12 Months Ended
Dec. 31, 2022
Notes Tables  
Schedule of Warrants, Valuation Assumptions [Table Text Block]

Description

 

For the year ended December 31,

 
  

2022

  

2021

 

Dividend-yield

  0%  0%

Risk-free interest rate

  1.75%  0.21%

Expected volatility

  151.41%  136.16%

Expected life (years)

  3   2 

Exercise price per share

 $10.47  $0.01 

Market value per share on grant date

 $11.29  $9.92 

Fair value per share on grant date

 $9.68  $9.91 
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
  

Warrants Outstanding & Exercisable

  

Weighted - Average Exercise Price

  

Average Remaining Term in Years

 

Outstanding December 31, 2020

  95  $2.59   4.95 

Granted

  292   0.01     

Exercised

  (332)  0.32     

Outstanding December 31, 2021

  55  $2.59   3.95 

Granted

  527   10.47     

Exercised

  (227)  0.01     

Outstanding December 31, 2022

  355  $15.92   7.48