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Investment in Leasing Operations: Minimum Lease Payments Receivable (Details) - USD ($)
Jun. 26, 2021
Dec. 26, 2020
Direct Financing and Sales-Type Leases, Minimum Lease Payments Receivable    
2021 $ 4,651,400  
2022 3,365,300  
2023 143,100  
2024 3,400  
Total 8,163,200 $ 12,536,300
Direct Financing and Sales-Type Leases, Income Amortization    
2021 558,500  
2022 257,100  
2023 10,100  
2024 100  
Total $ 825,800