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Note 5 - Shareholders' Equity (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Schedule of Preferred Stock [Table Text Block]
Preferred Stock RollforwardBalance as of December 31, 2021Accrued Deemed DividendsBalance as of March 31, 2022
Series A3,155,000100,0003,255,000
Series B1,715,00034,0001,749,000
Series C1,630,00034,0001,664,000
Series D1,512,00034,0001,546,000
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
  

Shares under

Option

  

Weighted

Average

Exercise

Price

 

Balance at December 31, 2021

  128,000  $1.75 

Granted

  -   - 

Cancelled/Expired

  -   - 

Exercised/Issued

  -   - 

Outstanding at March 31, 2022

  128,000   1.75 
         

Exercisable at March 31, 2022

  128,000  $1.75 
Shares Reserved for Future Issuance [Table Text Block]

Series A Preferred Stock

  5,482,000 

Series B Preferred Stock

  1,700,000 

Series C Preferred Stock

  1,700,000 

Series D Preferred Stock

  1,700,000 

2021 Warrants

  128,572 

Shares reserved as of March 31, 2022 and December 31, 2021

  10,710,572