Investment in Leasing Operations: (Details 3) (USD $)	Dec. 29, 2012	Dec. 31, 2011
Direct Financing and Sales-Type Leases, Minimum Lease Payments Receivable
2013	$ 17,848,200
2014	11,013,100
2015	3,734,000
2016	498,800
Total	33,094,100	27,413,300
Direct Financing and Sales-Type Leases, Income Amortization
2013	3,745,300
2014	1,214,300
2015	190,100
2016	5,700
Total	5,155,400	4,217,000
Operating Leases, Minimum Lease Payments Receivable
2013	1,419,100
2014	132,400
Total	$ 1,551,500