Consolidated Statements of Changes in Shareholders' Equity (USD $)	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Total
Balance at Apr. 01, 2012	$ 88,000	$ 45,135,900	$ (46,276,400)	$ 94,704,400	$ 93,651,900
Balance (in shares) at Apr. 01, 2012	7,744,528
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Proceeds from issuance of stock	300	486,500			486,800
Proceeds from issuance of stock (in shares)	24,908
Treasury stock purchases			(2,161,900)		(2,161,900)
Treasury stock purchases (in shares)	(101,854)
Non-cash stock compensation expense	3,200	2,533,600			2,536,800
Non-cash stock compensation expense (in shares)	320,318
Excess tax benefit from stock-based compensation		2,325,600			2,325,600
Cash dividends paid				(11,830,500)	(11,830,500)
Net income				17,793,900	17,793,900
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 [Roll Forward]
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				8,180,484
Increase (Decrease) in Stockholders' Equity [Roll Forward]
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