v3.26.3
Segment Reporting: (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 26, 2026
Sep. 27, 2025
Sep. 26, 2026
Sep. 27, 2025
Dec. 27, 2025
Segment Reporting          
Number of reportable operating segments     1    
Revenue:          
Other   $ 46,600   $ 2,401,100  
Revenues $ 27,890,500 22,632,900 $ 70,706,200 64,969,400  
Expenses:          
Selling, general and administrative expenses 7,332,100 7,046,400 22,708,200 21,070,500  
Reconciliation to operating income:          
Total income from operations 15,785,800 14,923,200 41,788,500 41,580,800  
Identifiable assets:          
Total identifiable assets 45,034,700   45,034,700   $ 24,884,100
Merchandise sales          
Revenue:          
Revenue 1,031,500 693,600 2,544,700 2,438,500  
Expenses:          
Cost of merchandise and services sold 947,300 663,300 2,384,200 2,318,100  
North American advertising fund          
Revenue:          
Revenue 3,825,300   3,825,300    
Expenses:          
Cost of merchandise and services sold 3,825,300   3,825,300    
Operating          
Revenue:          
Revenues 27,890,500 22,632,900 70,706,200 64,969,400  
Reconciliation to operating income:          
Total income from operations 15,785,800 14,923,200 41,788,500 41,580,800  
Depreciation and amortization:          
Total depreciation and amortization 211,600 187,700 546,800 561,000  
Operating | Franchising          
Revenue:          
Revenues 27,890,500 22,586,300 70,706,200 62,568,300  
Expenses:          
Selling, general and administrative expenses 7,332,100 7,042,700 22,708,200 20,979,000  
Total segment expenses 12,104,700 7,706,000 28,917,700 23,297,100  
Reconciliation to operating income:          
Total income from operations 15,785,800 14,880,300 41,788,500 39,271,200  
Depreciation and amortization:          
Total depreciation and amortization 211,600 187,700 546,800 561,000  
Operating | Franchising | Merchandise sales          
Expenses:          
Cost of merchandise and services sold 947,300 663,300 2,384,200 2,318,100  
Operating | Franchising | North American advertising fund          
Expenses:          
Cost of merchandise and services sold $ 3,825,300   $ 3,825,300    
Operating | Other          
Revenue:          
Revenues   46,600   2,401,100  
Reconciliation to operating income:          
Total income from operations   $ 42,900   $ 2,309,600