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Segment Reporting: (Details)
 3 Months Ended
Apr. 01, 2023
USD ($)
item
Mar. 26, 2022
USD ($)
Segment Reporting    
Number of reportable business segments | item 1  
Total revenue $ 20,523,600 $ 20,049,800
Total operating income 12,388,400 13,438,200
Total depreciation and amortization 192,500 102,500
Operating | Franchising    
Segment Reporting    
Total revenue 18,886,600 17,178,100
Total operating income 11,207,500 11,200,700
Operating | Leasing    
Segment Reporting    
Total revenue 1,637,000 2,871,700
Total operating income $ 1,180,900 $ 2,237,500