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Note 7 - Stockholders' Equity (Details Textual) - USD ($)
 3 Months Ended
Jan. 15, 2020
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Common Stock, Shares Authorized (in shares)   25,000,000   25,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share)   $ 0.001   $ 0.001
Common Stock, Shares, Issued, Total (in shares)   20,555,880 18,302,880 20,547,668
Preferred Stock, Shares Authorized (in shares)   2,500,000   2,500,000
Preferred Stock, Shares Issued, Total (in shares)   0   0
Stock Issued During Period, Value, Issued for Services   $ 45,000 $ 112,500  
Share-based Payment Arrangement, Expense   $ 141,222 $ 128,444  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance (in shares)   25,000   25,000
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount   $ 0    
Common Stock, Shares, Outstanding, Ending Balance (in shares)   20,555,880 18,302,880 20,547,668
Preferred Stock, Shares Outstanding, Ending Balance (in shares)   0   0
The 2011 Stock Options Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance (in shares)   25,000    
Stock Awards Other than Options [Member]        
Share-based Payment Arrangement, Expense   $ 141,222 $ 128,444  
Share-based Payment Arrangement, Option [Member] | The 2011 Stock Options Plan [Member]        
Share-based Payment Arrangement, Expense   $ 0 $ 0  
Director [Member]        
Stock Issued During Period, Shares, Issued for Services (in shares) 8,212      
Stock Issued During Period, Value, Issued for Services $ 45,000      
Convertible Preferred Stock [Member]        
Preferred Stock, Shares Issued, Total (in shares)   0 0  
Preferred Stock, Shares Outstanding, Ending Balance (in shares)   0 0