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Note 1 - Business and Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
  

December 31,

 
  

2021

  

2020

 

Options

  53,711,609   20,212,174 

Warrants

  142,604,000   2,190,000 

Series A convertible preferred stock

  115,000   115,000 

Convertible debt

  39,836,388   38,753,799 

Total potentially dilutive shares

  236,266,997   61,270,973 
Accounting Standards Update and Change in Accounting Principle [Table Text Block]
  

Balance at

December 31, 2020

  

Impact of ASU

2020-06

  

Balance with

Adoption of ASU

2020-06

 

Liabilities

            

Long-term debt, net

 $266,598  $862,775  $1,129,373 

Equity

            

Additional paid-in-capital

 $8,033,313  $(988,900) $7,044,413 

Accumulated deficit

 $(7,339,175) $126,125  $(7,213,050)