Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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The net result for the period of deducting operating expenses from operating revenues.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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Segment Reporting: (Details) (USD $)	3 Months Ended								12 Months Ended
Segment Reporting: (Details) (USD $)	Dec. 27, 2014	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 27, 2014 item	Dec. 28, 2013	Dec. 29, 2012
Segment Reporting
Number of reportable business segments									2us-gaap_NumberOfReportableSegments
Total revenue	$ 16,182,800us-gaap_Revenues	$ 16,404,400us-gaap_Revenues	$ 14,038,900us-gaap_Revenues	$ 14,552,600us-gaap_Revenues	$ 13,767,400us-gaap_Revenues	$ 14,791,900us-gaap_Revenues	$ 14,023,500us-gaap_Revenues	$ 13,148,400us-gaap_Revenues	$ 61,178,700us-gaap_Revenues	$ 55,731,200us-gaap_Revenues	$ 51,943,100us-gaap_Revenues
Total operating income	9,354,500us-gaap_OperatingIncomeLoss	9,177,700us-gaap_OperatingIncomeLoss	7,092,600us-gaap_OperatingIncomeLoss	7,434,500us-gaap_OperatingIncomeLoss	7,501,600us-gaap_OperatingIncomeLoss	8,541,300us-gaap_OperatingIncomeLoss	7,061,200us-gaap_OperatingIncomeLoss	6,675,900us-gaap_OperatingIncomeLoss	33,059,300us-gaap_OperatingIncomeLoss	29,780,000us-gaap_OperatingIncomeLoss	27,299,100us-gaap_OperatingIncomeLoss
Total depreciation									412,000	431,500	433,300
Total identifiable assets	54,727,800us-gaap_Assets				53,036,100us-gaap_Assets				54,727,800us-gaap_Assets	53,036,100us-gaap_Assets
Franchising \| Canadian operations
Segment Reporting
Total revenue									2,900,000	2,700,000	2,500,000
Operating \| Franchising
Segment Reporting
Total revenue									44,931,400	41,207,100	38,731,300
Total operating income									23,631,800	21,867,700	20,705,100
Total depreciation									325,100	339,600	337,200
Total identifiable assets	3,258,300				7,407,400				3,258,300	7,407,400
Operating \| Leasing
Segment Reporting
Total revenue									16,247,300	14,524,100	13,211,800
Total operating income									9,427,500	7,912,300	6,594,000
Total depreciation									86,900	91,900	96,100
Total identifiable assets	44,870,800				42,490,800				44,870,800	42,490,800
Unallocated
Segment Reporting
Total identifiable assets	$ 6,598,700				$ 3,137,900				$ 6,598,700	$ 3,137,900