Investment in Leasing Operations: (Details 3) - USD ($)	Sep. 26, 2015	Dec. 27, 2014
Direct Financing and Sales-Type Leases, Minimum Lease Payments Receivable
2015	$ 6,320,200
2016	18,984,100
2017	9,748,000
2018	1,192,300
2019	2,000
Total	36,246,600	$ 40,739,900
Direct Financing and Sales-Type Leases, Income Amortization
2015	1,228,500
2016	2,939,300
2017	789,800
2018	25,600
Total	4,983,200
Operating Leases, Minimum Lease Payments Receivable
2015	7,600
Total	$ 7,600