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Note 2 - Significant Accounting Policies (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
  

For the Three Months Ended March 31,

 
  

2022

  

2021

 
         

Common Stock Warrants

  2,000,000    

Placement Agent Warrants

  80,000    

Series A Warrants

  14,450,069    

Unvested Common Stock Grants

  568,319   387,980 
         

Total potentially dilutive shares

  17,098,388   387,980