Note 4 - Marketable Securities (Details) (USD $)	3 Months Ended		9 Months Ended
	Dec. 29, 2013	Dec. 23, 2012	Dec. 29, 2013	Dec. 23, 2012
Marketable Securities Disclosure [Abstract]
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	$ (33,000)	$ (55,000)	$ (140,000)	$ (119,000)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	$ (21,000)	$ (35,000)	$ (92,000)	$ (75,000)