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Segment Reporting: (Details) (USD $)
 3 Months Ended
Mar. 29, 2014
item
Mar. 30, 2013
Dec. 28, 2013
Segment Reporting:      
Number of reportable business segments 2    
Segment Reporting      
Total revenue $ 14,552,600 $ 13,148,400  
Total operating income 7,434,500 6,675,900  
Total depreciation 105,300 107,000  
Total identifiable assets 47,028,900   53,036,100
Operating | Franchising
      
Segment Reporting      
Total revenue 10,177,000 9,740,600  
Total operating income 4,701,200 4,834,100  
Total depreciation 83,100 84,200  
Total identifiable assets 2,534,100   7,407,400
Operating | Leasing
      
Segment Reporting      
Total revenue 4,375,600 3,407,800  
Total operating income 2,733,300 1,841,800  
Total depreciation 22,200 22,800  
Total identifiable assets 41,499,000   42,490,800
Unallocated
      
Segment Reporting      
Total identifiable assets $ 2,995,800   $ 3,137,900