Consolidated Statements of Changes in Shareholders' Equity - USD ($)	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Total
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	$ 100	143,100			143,200
Proceeds from issuance of stock (in shares)	9,250
Treasury stock purchases			(189,100)		(189,100)
Treasury stock purchases (in shares)	(10,488)
Non-cash stock compensation expense	$ 400	338,500			338,900
Non-cash stock compensation expense (in shares)	41,256
Cash dividends paid				(1,702,600)	(1,702,600)
Net loss				(2,492,800)	(2,492,800)
Balance at Jun. 30, 2019	$ 100,300	63,148,000	(57,803,200)	99,439,700	104,884,800
Balance (in shares) at Jun. 30, 2019	8,508,547
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	$ 200	132,500			$ 132,700
Proceeds from issuance of stock (in shares)	23,676
Treasury stock purchases			(58,800)		(58,800)
Treasury stock purchases (in shares)	(12,781)
Non-cash stock compensation expense	$ 600	311,300			311,900
Non-cash stock compensation expense (in shares)	48,685
Net loss				(4,631,400)	(4,631,400)
Balance at Jun. 28, 2020	$ 102,200	$ 65,762,300	$ (58,555,000)	$ 72,147,600	$ 79,457,100
Balance (in shares) at Jun. 28, 2020	8,637,129				8,637,129