CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (DEFICIT) - USD ($)	Common Stock	Retained Earnings (Accumulated Deficit).	Accumulated Other Comprehensive Income (Loss)	Total
BALANCE at Dec. 31, 2016	$ 2,976,100	$ (15,868,900)	$ (9,900)	$ (12,902,700)
BALANCE (in shares) at Dec. 31, 2016	4,165,769
Shareholders’ Equity (Deficit)
Repurchase of common stock	$ (5,766,200)	(44,136,300)		(49,902,500)
Repurchase of common stock (in shares)	(400,000)
Stock options exercised	$ 2,309,700			2,309,700
Stock options exercised (in shares)	77,309
Compensation expense relating to stock options	$ 1,956,600			1,956,600
Cash dividends		(1,765,000)		(1,765,000)
Comprehensive income		24,580,500	$ 9,900	24,590,400
BALANCE at Dec. 30, 2017	$ 1,476,200	(37,189,700)		(35,713,500)
BALANCE (in shares) at Dec. 30, 2017	3,843,078
Shareholders’ Equity (Deficit)
Repurchase of common stock	$ (1,846,400)			(1,846,400)
Repurchase of common stock (in shares)	(12,384)
Stock options exercised	$ 2,819,700			2,819,700
Stock options exercised (in shares)	76,992
Compensation expense relating to stock options	$ 1,976,100			1,976,100
Cash dividends		(2,169,900)		(2,169,900)
Comprehensive income		30,125,500		30,125,500
BALANCE at Dec. 29, 2018	$ 4,425,600	(9,234,100)		$ (4,808,500)
BALANCE (in shares) at Dec. 29, 2018	3,907,686			3,907,686
Shareholders’ Equity (Deficit)
Repurchase of common stock	$ (5,081,000)	(18,947,100)		$ (24,028,100)
Repurchase of common stock (in shares)	(150,000)
Stock options exercised	$ 10,918,300			10,918,300
Stock options exercised (in shares)	190,172
Compensation expense relating to stock options	$ 1,666,400			1,666,400
Cash dividends		(3,449,100)		(3,449,100)
Comprehensive income		32,149,300		32,149,300
BALANCE at Dec. 28, 2019	$ 11,929,300	$ 519,000		$ 12,448,300
BALANCE (in shares) at Dec. 28, 2019	3,947,858			3,947,858