Consolidated Statements of Changes in Shareholders' Equity - USD ($)	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Total
Balance at Mar. 26, 2017	$ 98,400	$ 59,006,000	$ (57,437,600)	$ 106,349,500	$ 108,016,300
Balance (in shares) at Mar. 26, 2017	8,337,669
Increase (Decrease) in Stockholders' Equity
Proceeds from issuance of stock	$ 400	604,000			604,400
Proceeds from issuance of stock (in shares)	44,458
Treasury stock purchases			(65,400)		(65,400)
Treasury stock purchases (in shares)	(4,443)
Non-cash stock compensation expense	$ 200	1,001,900			$ 1,002,100
Non-cash stock compensation expense (in shares)	18,853
Exercise of stock options (in shares)					0
Cash dividends paid				(6,701,200)	$ (6,701,200)
Net income (loss)				5,195,400	5,195,400
Balance at Apr. 01, 2018	$ 99,000	60,611,900	(57,503,000)	104,843,700	108,051,600
Balance (in shares) at Apr. 01, 2018	8,396,537
Increase (Decrease) in Stockholders' Equity
Proceeds from issuance of stock	$ 500	810,800			811,300
Proceeds from issuance of stock (in shares)	52,067
Treasury stock purchases			(111,100)		(111,100)
Treasury stock purchases (in shares)	(6,332)
Non-cash stock compensation expense	$ 300	1,243,700			$ 1,244,000
Non-cash stock compensation expense (in shares)	26,257
Exercise of stock options (in shares)					0
Cash dividends paid				(6,754,400)	$ (6,754,400)
Net income (loss)				5,545,800	5,545,800
Balance at Mar. 31, 2019	$ 99,800	62,666,400	(57,614,100)	103,635,100	$ 108,787,200
Balance (in shares) at Mar. 31, 2019	8,468,529				8,468,529
Increase (Decrease) in Stockholders' Equity
Proceeds from issuance of stock	$ 700	797,300			$ 798,000
Proceeds from issuance of stock (in shares)	72,430
Treasury stock purchases			(882,100)		(882,100)
Treasury stock purchases (in shares)	(55,321)
Non-cash stock compensation expense	$ 400	1,174,200			1,174,600
Non-cash stock compensation expense (in shares)	43,786
Exercise of stock options (in dollars)	$ 500	680,600			$ 681,100
Exercise of stock options (in shares)	48,125				48,125
Cash dividends paid				(5,287,200)	$ (5,287,200)
Net income (loss)				(21,568,900)	(21,568,900)
Balance at Mar. 29, 2020	$ 101,400	$ 65,318,500	$ (58,496,200)	$ 76,779,000	$ 83,702,700
Balance (in shares) at Mar. 29, 2020	8,577,549				8,577,549