Dividend Program (Detail) (USD $)	6 Months Ended				12 Months Ended		0 Months Ended
	Oct. 27, 2013	Oct. 28, 2012	Oct. 27, 2013 Quarterly Dividend [Member]	Oct. 28, 2012 Quarterly Dividend [Member]	Apr. 28, 2013 Quarterly Dividend [Member]	Jun. 12, 2013 Quarterly Dividend [Member]	Nov. 25, 2013 Subsequent Event [Member] Quarterly Dividend [Member]
Dividends [Line Items]
Percentage increase in payment of quarterly cash dividend						33.00%	25.00%
Cash dividend payment, per share			$ 0.04		$ 0.03
Cash dividend declared, per share							$ 0.05
Date of payment to shareholders entitled to dividends							Jan. 20, 2014
Date of record of shareholders entitled to dividends							Jan. 06, 2014
Cash dividends paid	$ 979,000	$ 747,000	$ 979,000	$ 747,000