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Note 2 - Revenue (Tables)
 12 Months Ended
Dec. 31, 2020
Notes Tables  
Disaggregation of Revenue [Table Text Block]
Year ended December 31,
(in thousands)
  
20
20
    
201
9
  
License
   $
3,600
     $
5,725
  
Professional services
    
20,610
      
19,203
  
Processing and maintenance
    
10,228
      
7,650
  
Third party
    
1,435
      
1,725
  
Total
   $
35,873
     $
34,303
  
Year ended December 31,
(in thousands)
  
20
20
    
201
9
  
European Union
   $
1,009
     $
3,834
  
United States
    
34,864
      
30,469
  
Total
   $
35,873
     $
34,303