Note 4 - Accrued Expenses
 12 Months Ended
Dec. 31, 2021
Notes to Financial Statements  
Accounts Payable and Accrued Liabilities Disclosure [Text Block]
4.
Accrued Expenses
 
Accrued expenses as shown on the accompanying Consolidated Balance Sheets is composed of the following as of
December 31, 2021
and
2020:
   
2021
    
2020
  
Accrued license fees – current   $
3,000,000
     $
-
  
Accrued license fees – noncurrent    
2,000,000
      
-
  
Accrued payroll
    
269,000
      
279,696
  
Other accrued expenses
    
108,826
      
79,585
  
Total accrued expenses
   $
5,377,826
     $
359,281