Consolidated Statements of Changes in Shareholders' Equity (USD $)	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) [Member]	Comprehensive Income [Member]	Total
Balance at Mar. 28, 2010	$ 81,500	$ 36,937,700	$ (42,819,400)	$ 75,543,000	$ (97,600)		$ 69,645,200
Balance (in shares) at Mar. 28, 2010	7,231,878
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Proceeds from issuance of stock	800	706,600					707,400
Proceeds from issuance of stock (in shares)	80,436
Treasury stock purchases			(1,569,000)				(1,569,000)
Treasury stock purchases (in shares)	(108,032)
Non-cash stock compensation expense	1,800	2,272,200					2,274,000
Non-cash stock compensation expense (in shares)	260,663
Excess tax benefit (loss) from stock-based compensation		751,600					751,600
Cash dividends paid				(3,020,300)			(3,020,300)
Comprehensive Income:
Net income				10,018,200		10,018,200	10,018,200
Other comprehensive loss, net of tax					73,000	73,000
Total comprehensive income						10,091,200	10,091,200
Balance at Mar. 27, 2011	84,100	40,668,100	(44,388,400)	82,540,900	(24,600)		78,880,100
Balance (in shares) at Mar. 27, 2011	7,464,945
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Proceeds from issuance of stock	1,700	1,114,100					1,115,800
Proceeds from issuance of stock (in shares)	169,978
Treasury stock purchases			(1,888,000)				(1,888,000)
Treasury stock purchases (in shares)	(114,445)
Non-cash stock compensation expense	2,200	2,926,000					2,928,200
Non-cash stock compensation expense (in shares)	224,050
Excess tax benefit (loss) from stock-based compensation		427,700					427,700
Cash dividends paid				(4,273,400)			(4,273,400)
Comprehensive Income:
Net income				16,436,900		16,436,900	16,436,900
Other comprehensive loss, net of tax					24,600	24,600
Total comprehensive income						16,461,500	16,461,500
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						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 (loss) from stock-based compensation		2,325,600					2,325,600
Cash dividends paid				(11,830,500)			(11,830,500)
Comprehensive Income:
Net income				17,793,900		17,793,900	17,793,900
Other comprehensive loss, net of tax						0
Total comprehensive income						17,793,900	17,793,900
Balance at Mar. 31, 2013	$ 91,500	$ 50,481,600	$ (48,438,300)	$ 100,667,800	$ 0		$ 102,802,600
Balance (in shares) at Mar. 31, 2013	7,987,900						7,987,900