XML 53 R32.htm IDEA: XBRL DOCUMENT v3.22.1
Note 9 - Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
  

Number of

  

Weighted

 
  

Common Stock

  

Average

 
  

Warrants

  

Exercise Price

 

Balance, December 31, 2020

  2,424,724  $6.36 

Warrants for common stock sold

      

Warrants for common stock exercised

      

Balance, December 31, 2021

  2,424,724  $6.36