CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (DEFICIT) - USD ($)	Common Stock	Retained Earnings (Accumulated Deficit)	Total
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)
Stock options exercised	$ 48,400		48,400
Stock options exercised (in shares)	6,428
Compensation expense relating to stock options	$ 490,800		490,800
Cash dividends		(423,200)	(423,200)
Comprehensive income (Net income)		6,960,400	6,960,400
BALANCE at Mar. 31, 2018	$ 2,015,400	(30,652,500)	(28,637,100)
BALANCE (in shares) at Mar. 31, 2018	3,849,506
Shareholders’ Equity (Deficit)
Stock options exercised	$ 798,100		798,100
Stock options exercised (in shares)	19,020
Compensation expense relating to stock options	$ 516,100		516,100
Cash dividends		(577,900)	(577,900)
Comprehensive income (Net income)		7,143,000	7,143,000
BALANCE at Jun. 30, 2018	$ 3,329,600	(24,087,400)	(20,757,800)
BALANCE (in shares) at Jun. 30, 2018	3,868,526
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	$ 156,600		156,600
Stock options exercised (in shares)	1,500
Compensation expense relating to stock options	$ 498,800		498,800
Cash dividends		(586,100)	(586,100)
Comprehensive income (Net income)		7,272,200	7,272,200
BALANCE at Mar. 30, 2019		(21,495,100)	(21,495,100)
BALANCE (in shares) at Mar. 30, 2019	3,759,186
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
BALANCE at Jun. 29, 2019	$ 1,305,600	(15,136,000)	$ (13,830,400)
BALANCE (in shares) at Jun. 29, 2019	3,781,339		3,781,339
BALANCE at Mar. 30, 2019		(21,495,100)	$ (21,495,100)
BALANCE (in shares) at Mar. 30, 2019	3,759,186
Shareholders’ Equity (Deficit)
Stock options exercised	$ 788,800		788,800
Stock options exercised (in shares)	22,153
Compensation expense relating to stock options	$ 516,800		516,800
Cash dividends		(942,800)	(942,800)
Comprehensive income (Net income)		7,301,900	7,301,900
BALANCE at Jun. 29, 2019	$ 1,305,600	$ (15,136,000)	$ (13,830,400)
BALANCE (in shares) at Jun. 29, 2019	3,781,339		3,781,339