Borrowings Under Revolving Credit Facility (Details) (USD $)	0 Months Ended	12 Months Ended
	Dec. 27, 2012	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013	Oct. 16, 2013
Line of Credit Facility [Line Items]
Maximum borrowings during period		$ 17,331,900	$ 13,467,000	$ 18,989,600
Covenant compliance		The Company was in compliance with the terms and financial covenants applicable to each of the revolving credit facility and term loan facility.	The Company was in compliance with the terms and financial covenants applicable to each of the revolving credit facility and term loan facility.	The Company was in compliance with the terms and financial covenants applicable to each of the revolving credit facility and term loan facility.
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity		35,000,000	35,000,000		35,000,000
Expiration date		Oct. 31, 2016
Common stock dividends (in dollars per share)	$ 0.75
Dividends payable, date paid	Dec. 27, 2012
Dividends payable, date of record	Dec. 13, 2012
Purchase of additional shares of common stock		11,700,000
Interest rate variable rate basis		LIBOR
Weighted average interest rate (in hundredths)		1.65%	2.35%	2.68%
Interest expense		78,200	53,400	77,400
Average borrowings during period		4,672,300	2,243,900	2,858,500
Amount outstanding		0	0
Revolving Credit Facility [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Interest rate spread on variable rate basis (in hundredths)		1.50%
Revolving Credit Facility [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Dividend payment permitted by lender agreement		8,000,000
Rolling dividend payment period permitted by lender agreement		12 months
Stock repurchase permitted by lender agreement		$ 30,000,000
Interest rate spread on variable rate basis (in hundredths)		2.50%