Investment in Leasing Operations: Summary of Leasing Operations (Details) - USD ($)	Mar. 31, 2018	Dec. 30, 2017
Direct financing and sales-type leases:
Minimum lease payments receivable	$ 42,599,200	$ 36,119,700
Estimated residual value of equipment	3,697,900	4,762,700
Unearned lease income net of initial direct costs deferred	(8,222,800)	(5,371,900)
Security deposits	(4,480,500)	(4,526,000)
Equipment installed on leases not yet commenced	8,996,200	10,989,700
Total investment in direct financing and sales-type leases	42,590,000	41,974,200
Allowance for credit losses	(780,600)	(711,200)
Net investment in direct financing and sales-type leases	41,809,400	41,263,000
Operating leases:
Operating lease assets	1,211,900	1,045,400
Less accumulated depreciation and amortization	(1,114,800)	(1,030,800)
Net investment in operating leases	97,100	14,600
Total net investment in leasing operations	41,906,500	41,277,600
Net investment in leases - current	15,597,200	15,332,300
Net investment in leases - long-term	$ 26,309,300	$ 25,945,300