CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
REVENUE:
Royalties	$ 45,643,500	$ 43,994,900	$ 41,908,000
Leasing income	18,470,200	17,283,600	21,565,700
Merchandise sales	2,572,200	2,216,900	2,816,900
Franchise fees	1,529,700	1,624,800	1,788,100
Other	1,530,300	1,460,100	1,369,100
Total revenue	69,745,900	66,580,300	69,447,800
COST OF MERCHANDISE SOLD	2,432,600	2,101,400	2,653,100
LEASING EXPENSE	3,269,100	2,323,800	5,759,300
PROVISION FOR CREDIT LOSSES	9,000	18,500	(149,700)
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES	25,250,600	23,835,600	24,094,400
Income from operations	38,784,600	38,301,000	37,090,700
INTEREST EXPENSE	(2,366,400)	(2,342,800)	(1,802,200)
INTEREST AND OTHER INCOME (EXPENSE)	12,900	(12,200)	(63,700)
Income before income taxes	36,431,100	35,946,000	35,224,800
PROVISION FOR INCOME TAXES	(11,866,000)	(13,728,400)	(13,425,100)
NET INCOME	$ 24,565,100	$ 22,217,600	$ 21,799,700
EARNINGS PER SHARE - BASIC (in dollars per share)	$ 6.06	$ 5.39	$ 4.89
EARNINGS PER SHARE - DILUTED (in dollars per share)	$ 5.66	$ 5.13	$ 4.69
WEIGHTED AVERAGE SHARES OUTSTANDING - BASIC (in shares)	4,056,049	4,122,854	4,458,927
WEIGHTED AVERAGE SHARES OUTSTANDING - DILUTED (in shares)	4,339,944	4,330,490	4,651,527