Consolidated Statements of Changes in Shareholders' Equity - USD ($)	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Total
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 (loss) income				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
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 (loss) income				(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
Increase (Decrease) in Stockholders' Equity
Proceeds from issuance of stock	$ 1,300	699,700			$ 701,000
Proceeds from issuance of stock (in shares)	130,907
Treasury stock purchases			(121,600)		(121,600)
Treasury stock purchases (in shares)	(23,031)
Non-cash stock compensation expense	$ 1,500	1,209,500			$ 1,211,000
Non-cash stock compensation expense (in shares)	148,408
Exercise of stock options (in shares)					0
Retirement of treasury stock			58,555,000	(58,555,000)
Net (loss) income				(8,742,900)	$ (8,742,900)
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				8,833,833