Investment in Leasing Operations: (Details) (USD $)	Jun. 28, 2014	Dec. 28, 2013
Direct financing and sales-type leases:
Minimum lease payments receivable	$ 46,395,400	$ 35,450,900
Estimated residual value of equipment	4,875,200	4,348,800
Unearned lease income net of initial direct costs deferred	(7,314,700)	(4,963,400)
Security deposits	(3,400,000)	(3,325,600)
Equipment installed on leases not yet commenced	3,468,800	6,718,000
Total investment in direct financing and sales-type leases	44,024,700	38,228,700
Allowance for credit losses	(939,300)	(822,700)
Net investment in direct financing and sales-type leases	43,085,400	37,406,000
Operating leases:
Operating lease assets	489,600	1,353,500
Less accumulated depreciation and amortization	(348,000)	(1,218,200)
Net investment in operating leases	141,600	135,300
Total net investment in leasing operations	43,227,000	37,541,300
Net investment in leases - current	21,023,400	17,239,900
Net investment in leases - long-term	$ 22,203,600	$ 20,301,400