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Note 18 - Other Supplemental Information (Tables)
 12 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Other Supplement Information [Table Text Block]
    2020   2019
         
Franchisor operations                
Revenues   $
136,746
     $
148,607
  
Operating earnings    
38,340
      
33,999
  
Initial franchise fee revenues    
4,294
      
4,956
  
Depreciation and amortization    
8,569
      
6,959
  
Total assets    
155,319
      
140,439
  
                 
Cash payments made during the period                
Income taxes   $
49,031
     $
31,562
  
Interest    
22,305
      
29,772
  
                 
Non-cash financing activities                
Increases in finance lease obligations   $
3,898
     $
9,928