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)					(2,544,000)
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
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
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)					$ 865,800
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				9,163,170
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				9,163,170