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Operating Leases: Maturities and other (Details) - USD ($)
6 Months Ended
Jul. 01, 2023
Jun. 25, 2022
Maturities of operating lease liabilities:    
2023 $ 385,100  
2024 784,400  
2025 806,000  
2026 828,200  
2027 851,100  
Thereafter 1,773,300  
Total 5,428,100  
Less imputed interest (929,600)  
Present value of lease liabilities 4,498,500  
Operating lease liability    
Operating lease liability, current $ 500,000  
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Accrued Liabilities, Current  
Cash paid for amounts included in the measurement of lease liabilities:    
Operating cash flow outflow from operating leases $ 378,200 $ 368,100