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Investment in Leasing Operations: (Details 3) (USD $)
Jun. 28, 2014
Dec. 28, 2013
Direct Financing and Sales-Type Leases, Minimum Lease Payments Receivable    
2014 $ 14,259,100  
2015 20,264,000  
2016 9,947,300  
2017 1,919,700  
2018 5,300  
Total 46,395,400 35,450,900
Direct Financing and Sales-Type Leases, Income Amortization    
2014 3,178,600  
2015 3,251,700  
2016 849,400  
2017 34,900  
2018 100  
Total 7,314,700  
Operating Leases, Minimum Lease Payments Receivable    
2014 128,000  
2015 76,800  
Total $ 204,800