Investment in Leasing Operations: Summary of Leasing Operations (Details) - USD ($)	Dec. 31, 2016	Dec. 26, 2015
Direct financing and sales-type leases:
Minimum lease payments receivable	$ 37,839,800	$ 37,181,600
Estimated residual value of equipment	4,754,200	4,511,000
Unearned lease income net of initial direct costs deferred	(5,844,500)	(4,999,700)
Security deposits	(4,424,400)	(3,640,500)
Equipment installed on leases not yet commenced	9,961,600	6,754,200
Total investment in direct financing and sales-type leases	42,286,700	39,806,600
Allowance for credit losses	(896,000)	(859,100)
Net investment in direct financing and sales-type leases	41,390,700	38,947,500
Operating leases:
Operating lease assets	800,700	1,083,300
Less accumulated depreciation and amortization	(775,900)	(1,043,300)
Net investment in operating leases	24,800	40,000
Total net investment in leasing operations	41,415,500	38,987,500
Net investment in leases - current	17,004,800	17,741,500
Net investment in leases - long-term	$ 24,410,700	$ 21,246,000