Investment in Leasing Operations: Credit Losses (Details) - USD ($)	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Activity in the allowance for credit losses for leasing operations
Balance at beginning of period	$ 386,000	$ 822,700	$ 775,800
Provisions charged to expense	(149,700)	62,900	(44,700)
Recoveries	632,200	106,900	127,500
Deductions for amounts written-off	(9,400)	(606,500)	(35,900)
Balance at end of period	859,100	386,000	$ 822,700
Investment In Leases
Total investment in direct financing and sales-type leases	39,806,600	44,136,800
Allowance for Credit Losses
Total	859,100	386,000
Investment in leases
Investment In Leases
Collectively evaluated for loss potential	39,806,600	44,136,800
Total investment in direct financing and sales-type leases	39,806,600	44,136,800
Allowance for Credit Losses
Collectively evaluated for loss potential	859,100	386,000
Total	$ 859,100	$ 386,000