CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (DEFICIT) - USD ($)	Common Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total
BALANCE at Dec. 29, 2012		$ 17,932,000	$ (4,000)	$ 17,928,000
BALANCE (in shares) at Dec. 29, 2012	4,996,459
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of common stock	$ (1,854,900)			(1,854,900)
Repurchase of common stock (in shares)	(28,422)
Stock options exercised and related tax benefits	$ 3,650,800			3,650,800
Stock options exercised and related tax benefits (in shares)	175,493
Compensation expense relating to stock options	$ 1,153,600			1,153,600
Cash dividends		(964,300)		(964,300)
Comprehensive income (loss)		18,231,600	(100)	18,231,500
BALANCE at Dec. 28, 2013	$ 2,949,500	35,199,300	(4,100)	38,144,700
BALANCE (in shares) at Dec. 28, 2013	5,143,530
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of common stock	$ (4,453,400)	(7,111,400)		(11,564,800)
Repurchase of common stock (in shares)	(166,030)
Stock options exercised and related tax benefits	$ 509,100			509,100
Stock options exercised and related tax benefits (in shares)	21,012
Compensation expense relating to stock options	$ 1,417,200			1,417,200
Cash dividends		(26,930,200)		(26,930,200)
Comprehensive income (loss)		20,066,500	(33,000)	20,033,500
BALANCE at Dec. 27, 2014	$ 422,400	21,224,200	(37,100)	$ 21,609,500
BALANCE (in shares) at Dec. 27, 2014	4,998,512			4,998,512
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of common stock	$ (2,010,600)	(72,843,100)		$ (74,853,700)
Repurchase of common stock (in shares)	(881,518)
Stock options exercised and related tax benefits	$ 299,900			299,900
Stock options exercised and related tax benefits (in shares)	7,773
Compensation expense relating to stock options	$ 1,694,800			1,694,800
Cash dividends		(1,228,200)		(1,228,200)
Comprehensive income (loss)		21,799,700	4,200	21,803,900
BALANCE at Dec. 26, 2015	$ 406,500	$ (31,047,400)	$ (32,900)	$ (30,673,800)
BALANCE (in shares) at Dec. 26, 2015	4,124,767			4,124,767