Consolidated Statements of Changes in Shareholders' Equity - USD ($)	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Total
Balance at Mar. 31, 2013	$ 91,500	$ 50,481,600	$ (48,438,300)	$ 100,667,800	$ 102,802,600
Balance (in shares) at Mar. 31, 2013	7,987,900
Increase (Decrease) in Stockholders' Equity
Proceeds from issuance of stock	$ 200	602,800			603,000
Proceeds from issuance of stock (in shares)	23,542
Treasury stock purchases			(1,646,300)		(1,646,300)
Treasury stock purchases (in shares)	(72,116)
Non-cash stock compensation expense	$ 2,500	2,084,600			2,087,100
Non-cash stock compensation expense (in shares)	241,158
Excess tax benefit from stock-based compensation		818,700			818,700
Cash dividends paid				(6,086,100)	(6,086,100)
Net income				16,249,100	16,249,100
Balance at Mar. 30, 2014	$ 94,200	53,987,700	(50,084,600)	110,830,800	114,828,100
Balance (in shares) at Mar. 30, 2014	8,180,484
Increase (Decrease) in Stockholders' Equity
Proceeds from issuance of stock	$ 200	540,000			540,200
Proceeds from issuance of stock (in shares)	19,425
Treasury stock purchases			(6,223,300)		(6,223,300)
Treasury stock purchases (in shares)	(211,033)
Non-cash stock compensation expense	$ 1,700	1,159,600			1,161,300
Non-cash stock compensation expense (in shares)	170,716
Excess tax benefit from stock-based compensation		830,300			830,300
Cash dividends paid				(6,628,800)	(6,628,800)
Net income				8,634,300	8,634,300
Balance at Mar. 29, 2015	$ 96,100	56,517,600	(56,307,900)	112,836,300	$ 113,142,100
Balance (in shares) at Mar. 29, 2015	8,159,592				8,159,592
Increase (Decrease) in Stockholders' Equity
Proceeds from issuance of stock	$ 300	487,000			$ 487,300
Proceeds from issuance of stock (in shares)	25,067
Treasury stock purchases			(937,300)		(937,300)
Treasury stock purchases (in shares)	(40,623)
Non-cash stock compensation expense	$ 1,200	727,800			729,000
Non-cash stock compensation expense (in shares)	128,088
Excess tax benefit from stock-based compensation		381,400			381,400
Cash dividends paid				(6,615,700)	(6,615,700)
Net income				5,340,500	5,340,500
Balance at Mar. 27, 2016	$ 97,600	$ 58,113,800	$ (57,245,200)	$ 111,561,100	$ 112,527,300
Balance (in shares) at Mar. 27, 2016	8,272,124				8,272,124