Investment in Leasing Operations: Summary of Leasing Operations (Details) - USD ($)	Dec. 28, 2019	Dec. 29, 2018
Direct financing and sales-type leases:
Minimum lease payments receivable	$ 26,001,200
Minimum lease payments receivable		$ 40,822,400
Estimated unguaranteed residual value of equipment	4,109,800
Estimated unguaranteed residual value of equipment		4,741,200
Unearned lease income net of initial direct costs deferred	(4,039,400)
Unearned lease income net of initial direct costs deferred		(6,739,900)
Security deposits	(3,852,000)
Security deposits		(4,118,300)
Equipment installed on leases not yet commenced	3,437,800
Equipment installed on leases not yet commenced		5,094,800
Total investment in direct financing and sales-type leases	25,657,400
Total investment in direct financing and sales-type leases		39,800,200
Allowance for credit losses	(580,600)
Allowance for credit losses		(861,200)
Net investment in direct financing and sales-type leases	25,076,800
Net investment in direct financing and sales-type leases		38,939,000
Operating leases:
Operating lease assets	820,700
Less accumulated depreciation and amortization	(591,900)
Net investment in operating leases	228,800
Total net investment in leasing operations	25,305,600
Operating lease assets		777,000
Less accumulated depreciation and amortization		(713,000)
Net investment in operating leases		64,000
Total net investment in leasing operations		39,003,000
Net investment in leases - current	12,800,100
Net investment in leases - long-term	$ 12,505,500
Net investment in leases - current		18,547,500
Net investment in leases - long-term		$ 20,455,500