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Note 6 - Stockholders' Equity, Options, and Warrants (Tables)
6 Months Ended
Jun. 30, 2023
Notes Tables  
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
          

Weighted

     
      

Weighted

  

Average

     
      

Average

  

Remaining

  

Aggregate

 

Fixed Options

 

Shares

  

Exercise Price

  

Contractual Life

  

Intrinsic Value

 

Outstanding at December 31, 2022

  24,993,500  $0.05         

Granted

  3,025,000   0.04         

Exercised

              

Expired

  (1,000,000)  0.09         

Forfeited

  (1,006,000)  0.08         

Outstanding at June 30, 2023

  26,012,500   0.05   6.1  $860,550 

Exercisable at June 30, 2023

  19,117,500  $0.05   5.1  $686,630