CONSOLIDATED CONDENSED STATEMENTS OF SHAREHOLDERS' EQUITY (DEFICIT) - USD ($)	Common Stock	Retained Earnings (Accumulated Deficit).	Total
BALANCE at Dec. 28, 2019	$ 11,929,300	$ 519,000	$ 12,448,300
BALANCE (in shares) at Dec. 28, 2019	3,947,858
Shareholders' Equity (Deficit)
Repurchase of common stock	$ (12,215,500)	(36,772,000)	(48,987,500)
Repurchase of common stock (in shares)	(300,000)
Stock options exercised	$ 145,900		145,900
Stock options exercised (in shares)	2,895
Compensation expense relating to stock options	$ 140,300		140,300
Cash dividends		(912,200)	(912,200)
Comprehensive income (Net income)		7,317,000	7,317,000
BALANCE at Mar. 28, 2020		(29,848,200)	(29,848,200)
BALANCE (in shares) at Mar. 28, 2020	3,650,753
BALANCE at Dec. 26, 2020	$ 9,281,800	(20,660,500)	$ (11,378,700)
BALANCE (in shares) at Dec. 26, 2020	3,756,028		3,756,028
Shareholders' Equity (Deficit)
Repurchase of common stock	$ (9,935,800)	(519,400)	$ (10,455,200)
Repurchase of common stock (in shares)	(58,255)
Stock options exercised	$ 268,800		268,800
Stock options exercised (in shares)	2,950
Compensation expense relating to stock options	$ 385,200		385,200
Cash dividends		(935,400)	(935,400)
Comprehensive income (Net income)		9,311,100	9,311,100
BALANCE at Mar. 27, 2021		$ (12,804,200)	$ (12,804,200)
BALANCE (in shares) at Mar. 27, 2021	3,700,723		3,700,723