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Segment Reporting: (Details) (USD $)
 3 Months Ended
Mar. 30, 2013
item
Mar. 31, 2012
Dec. 29, 2012
Segment Reporting:      
Number of reportable business segments 2    
Segment Reporting      
Total revenue $ 13,148,400 $ 11,833,400  
Total operating income 6,675,900 5,846,200  
Total depreciation 107,000 114,500  
Total identifiable assets 41,676,600   43,538,800
Franchising
      
Segment Reporting      
Total revenue 9,740,600 9,441,300  
Total operating income 4,834,100 4,828,500  
Total depreciation 84,200 88,900  
Total identifiable assets 2,159,500   2,957,200
Leasing
      
Segment Reporting      
Total revenue 3,407,800 2,392,100  
Total operating income 1,841,800 1,017,700  
Total depreciation 22,800 25,600  
Total identifiable assets 38,030,900   37,622,800
Unallocated
      
Segment Reporting      
Total identifiable assets $ 1,486,200   $ 2,958,800