CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 26, 2015	Dec. 27, 2014
REVENUE:
Royalties	$ 43,994,900	$ 41,908,000	$ 38,972,400
Leasing income	17,283,600	21,565,700	16,247,300
Merchandise sales	2,216,900	2,816,900	2,728,600
Franchise fees	1,624,800	1,788,100	1,989,700
Other	1,460,100	1,369,100	1,240,700
Total revenue	66,580,300	69,447,800	61,178,700
COST OF MERCHANDISE SOLD	2,101,400	2,653,100	2,619,900
LEASING EXPENSE	2,323,800	5,759,300	1,630,600
PROVISION FOR CREDIT LOSSES	18,500	(149,700)	62,900
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES	23,835,600	24,094,400	23,806,000
Income from operations	38,301,000	37,090,700	33,059,300
INTEREST EXPENSE	(2,342,800)	(1,802,200)	(484,500)
INTEREST AND OTHER INCOME (EXPENSE)	(12,200)	(63,700)	14,000
Income before income taxes	35,946,000	35,224,800	32,588,800
PROVISION FOR INCOME TAXES	(13,728,400)	(13,425,100)	(12,522,300)
NET INCOME	$ 22,217,600	$ 21,799,700	$ 20,066,500
EARNINGS PER SHARE - BASIC (in dollars per share)	$ 5.39	$ 4.89	$ 3.96
EARNINGS PER SHARE - DILUTED (in dollars per share)	$ 5.13	$ 4.69	$ 3.85
WEIGHTED AVERAGE SHARES OUTSTANDING - BASIC (in shares)	4,122,854	4,458,927	5,069,391
WEIGHTED AVERAGE SHARES OUTSTANDING - DILUTED (in shares)	4,330,490	4,651,527	5,216,914