Income Taxes: (Details) (USD $)	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011
Income Taxes:
Federal statutory tax rate (as a percent)	35.00%
Reconciliation of the expected federal income tax expense based on the federal statutory tax rate to the actual income tax expense
Federal income tax expense at statutory rate (35%)	$ 8,104,400	$ 8,183,600
Valuation allowance	1,413,600	577,700
State and local income taxes, net of federal benefit	677,700	827,700
Permanent differences, including stock option expenses	60,200	(223,600)
Other, net	(38,300)	(78,800)
Total provision for income taxes	10,217,600	9,286,600
Current provision for income taxes:
Federal	8,332,400	4,718,000
State	1,186,000	860,000
Foreign	374,900	377,000
Current provision	9,893,300	5,955,000
Deferred provision for income taxes:
Federal	435,300	2,890,500
State	(111,000)	441,100
Deferred provision	324,300	3,331,600
Total provision for income taxes	10,217,600	9,286,600
Deferred tax assets:
Accounts receivable and lease reserves	368,600	315,600
Accrued restructuring charge	64,500	65,500
Non-qualified stock option expense	901,800	1,026,000
Deferred franchise and software license fees	519,800	464,700
Trademarks	96,400	98,300
Lease deposits	1,093,200	943,800
Loss from and impairment of equity and note investments	4,074,300	2,660,700
Valuation allowance	(4,074,300)	(2,660,700)
Other	301,800	305,900
Total deferred tax assets	3,346,100	3,219,800
Deferred tax liabilities:
Lease revenue and initial direct costs	(9,267,900)	(8,776,600)
Depreciation and amortization	(222,400)	(263,100)
Total deferred tax liabilities	(9,490,300)	(9,039,700)
Total net deferred tax liabilities	(6,144,200)	(5,819,900)
Excess tax benefits related to stock option exercises	884,300	249,500
Unrecognized tax benefits, including interest and penalties	323,400	334,800
Interest and penalties accrued related to unrecognized tax benefit	11,100	25,300
Activity related to the company's unrecognized tax benefits
Balance at the beginning of the period	309,500	155,900
Increases related to current year tax positions	95,900	88,600
Additions for tax positions of prior years		103,700
Subtractions for tax positions of prior years	(2,800)
Expiration of the statute of limitations for the assessment of taxes	(90,300)	(38,700)
Balance at the end of the period	$ 312,300	$ 309,500
Period over which various statutes of limitations are expected to expire	12 months