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Note 4 - Property and Equipment (Tables)
 12 Months Ended
Dec. 31, 2020
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
2020
    
2019
  
Software
   $
5,724,971
     $
4,951,648
  
Equipment
    
2,137,364
      
891,838
  
Furniture and fixtures
    
492,347
      
444,576
  
Leasehold improvements
    
170,583
      
170,583
  
Total property and equipment
    
8,525,265
      
6,458,645
  
Less: accumulated depreciation
    
(5,419,339
 )    
(4,901,124
 )
Net property and equipment
   $
3,105,926
     $
1,557,521