Investment in Leasing Operations: Minimum Lease Payments Receivable (Details) - USD ($)	Dec. 30, 2017	Dec. 31, 2016
Direct Financing and Sales-Type Leases, Minimum Lease Payments Receivable
2018	$ 20,679,500
2019	12,413,200
2020	2,982,900
2021	18,000
2022	13,700
Thereafter	12,400
Total	36,119,700	$ 37,839,800
Direct Financing and Sales-Type Leases, Income Amortization
2018	3,946,100
2019	1,296,900
2020	124,700
2021	2,300
2022	1,300
Thereafter	600
Total	$ 5,371,900