Segment Reporting (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 24, 2011	Jun. 25, 2011	Mar. 26, 2011	Dec. 29, 2012 item	Dec. 31, 2011
Segment Reporting
Number of reportable business segments									2
Segment Reporting
Total revenue	$ 13,118,200	$ 14,799,100	$ 12,192,400	$ 11,833,400	$ 13,231,800	$ 11,773,500	$ 15,224,800	$ 11,104,900	$ 51,943,100	$ 51,335,000
Total operating income	6,962,900	8,463,500	6,026,500	5,846,200	6,905,800	6,645,700	6,084,100	5,212,000	27,299,100	24,847,600
Total depreciation									433,300	479,100
Total identifiable assets	43,538,800				47,745,700				43,538,800	47,745,700
Franchising
Segment Reporting
Total revenue									38,731,300	34,923,300
Total operating income									20,705,100	18,389,300
Total depreciation									337,200	371,800
Total identifiable assets	2,957,200				7,753,200				2,957,200	7,753,200
Franchising | Canadian operations
Segment Reporting
Total revenue									2,500,000	2,500,000
Leasing
Segment Reporting
Total revenue									13,211,800	16,411,700
Total operating income									6,594,000	6,458,300
Total depreciation									96,100	107,300
Total identifiable assets	37,622,800				33,374,000				37,622,800	33,374,000
Unallocated
Segment Reporting
Total identifiable assets	$ 2,958,800				$ 6,618,500				$ 2,958,800	$ 6,618,500