Note 4 - Marketable Securities (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 30, 2014	Mar. 31, 2013	Mar. 25, 2012
Marketable Securities Disclosure [Abstract]
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	$ (180)	$ (168)	$ 16