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Investment in Leasing Operations: Leasing Income (Details) - USD ($)
12 Months Ended
Dec. 26, 2020
Dec. 28, 2019
Leasing income    
Interest income on direct financing and sales-type leases $ 3,651,700 $ 7,602,600
Selling profit (loss) at commencement of sales-type leases 2,117,500 2,470,300
Operating lease income 2,346,500 2,525,600
Income on sales of equipment under lease 5,246,000 2,855,400
Other 1,122,300 601,900
Leasing income $ 14,484,000 $ 16,055,800