Consolidated Statements of Changes in Shareholders' Equity - USD ($)	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Total
Balance at Mar. 28, 2021	$ 104,200	$ 67,227,700	$ (62,800)	$ 9,481,100	$ 76,750,200
Balance (in shares) at Mar. 28, 2021	8,833,833
Increase (Decrease) in Stockholders' Equity
Issuance of common stock for 401k match	$ 100	102,700			102,800
Issuance of common stock for 401k match (in shares)	13,782
Repurchase of stock from employees and directors for minimum tax withholdings			(28,900)		(28,900)
Repurchase of stock from employees and directors for minimum tax withholdings (in shares)	(3,960)
Non-cash stock compensation expense	$ 500	254,400			254,900
Non-cash stock compensation expense (in shares)	39,182
Exercise of stock options (in dollars)		10,900	(13,300)		(2,400)
Exercise of stock options (in shares)	1,754
Net income (loss)				(1,717,300)	(1,717,300)
Balance at Jun. 27, 2021	$ 104,800	67,595,700	(105,000)	7,763,800	75,359,300
Balance (in shares) at Jun. 27, 2021	8,884,591
Balance at Mar. 28, 2021	$ 104,200	67,227,700	(62,800)	9,481,100	76,750,200
Balance (in shares) at Mar. 28, 2021	8,833,833
Increase (Decrease) in Stockholders' Equity
Net income (loss)					(1,085,200)
Balance at Dec. 26, 2021	$ 105,600	68,369,700	(129,200)	8,395,900	76,742,000
Balance (in shares) at Dec. 26, 2021	8,962,932
Balance at Jun. 27, 2021	$ 104,800	67,595,700	(105,000)	7,763,800	75,359,300
Balance (in shares) at Jun. 27, 2021	8,884,591
Increase (Decrease) in Stockholders' Equity
Issuance of common stock for 401k match	$ 200	110,400			110,600
Issuance of common stock for 401k match (in shares)	16,419
Repurchase of stock from employees and directors for minimum tax withholdings			(24,200)		(24,200)
Repurchase of stock from employees and directors for minimum tax withholdings (in shares)	(4,244)
Non-cash stock compensation expense	$ 300	367,800			368,100
Non-cash stock compensation expense (in shares)	29,959
Net income (loss)				(826,700)	(826,700)
Balance at Sep. 26, 2021	$ 105,300	68,073,900	(129,200)	6,937,100	74,987,100
Balance (in shares) at Sep. 26, 2021	8,926,725
Increase (Decrease) in Stockholders' Equity
Issuance of common stock for 401k match	$ 200	113,200			113,400
Issuance of common stock for 401k match (in shares)	20,554
Proceeds from issuance of stock	$ 100	80,900			81,000
Proceeds from issuance of stock (in shares)	15,653
Non-cash stock compensation expense		101,700			101,700
Net income (loss)				1,458,800	1,458,800
Balance at Dec. 26, 2021	$ 105,600	68,369,700	(129,200)	8,395,900	76,742,000
Balance (in shares) at Dec. 26, 2021	8,962,932
Balance at Mar. 27, 2022	$ 105,900	69,166,100	(129,200)	6,780,300	$ 75,923,100
Balance (in shares) at Mar. 27, 2022	8,994,249				8,994,249
Increase (Decrease) in Stockholders' Equity
Issuance of common stock for 401k match	$ 200	94,000			$ 94,200
Issuance of common stock for 401k match (in shares)	15,941
Repurchase of stock from employees and directors for minimum tax withholdings			(137,100)		(137,100)
Repurchase of stock from employees and directors for minimum tax withholdings (in shares)	(23,623)
Non-cash stock compensation expense	$ 1,000	222,800			223,800
Non-cash stock compensation expense (in shares)	146,229
Net income (loss)				(275,100)	(275,100)
Balance at Jun. 26, 2022	$ 107,100	69,482,900	(266,300)	6,505,200	75,828,900
Balance (in shares) at Jun. 26, 2022	9,132,796
Balance at Mar. 27, 2022	$ 105,900	69,166,100	(129,200)	6,780,300	$ 75,923,100
Balance (in shares) at Mar. 27, 2022	8,994,249				8,994,249
Increase (Decrease) in Stockholders' Equity
Net income (loss)					$ 1,290,500
Balance at Dec. 25, 2022	$ 107,900	70,361,900	(287,300)	8,070,800	$ 78,253,300
Balance (in shares) at Dec. 25, 2022	9,205,200				9,205,200
Balance at Jun. 26, 2022	$ 107,100	69,482,900	(266,300)	6,505,200	$ 75,828,900
Balance (in shares) at Jun. 26, 2022	9,132,796
Increase (Decrease) in Stockholders' Equity
Issuance of common stock for 401k match	$ 200	129,300			129,500
Issuance of common stock for 401k match (in shares)	21,916
Repurchase of stock from employees and directors for minimum tax withholdings			(21,000)		(21,000)
Repurchase of stock from employees and directors for minimum tax withholdings (in shares)	(3,625)
Non-cash stock compensation expense	$ 100	308,700			308,800
Non-cash stock compensation expense (in shares)	12,083
Net income (loss)				1,140,900	1,140,900
Balance at Sep. 25, 2022	$ 107,400	69,920,900	(287,300)	7,646,100	77,387,100
Balance (in shares) at Sep. 25, 2022	9,163,170
Increase (Decrease) in Stockholders' Equity
Issuance of common stock for 401k match	$ 300	103,500			103,800
Issuance of common stock for 401k match (in shares)	25,079
Proceeds from issuance of stock	$ 200	71,400			71,600
Proceeds from issuance of stock (in shares)	16,951
Non-cash stock compensation expense		266,100			266,100
Net income (loss)				424,700	424,700
Balance at Dec. 25, 2022	$ 107,900	$ 70,361,900	$ (287,300)	$ 8,070,800	$ 78,253,300
Balance (in shares) at Dec. 25, 2022	9,205,200				9,205,200