Note 4 - Marketable Securities (Details) - Bond Maturities by Period (USD $) In Thousands, unless otherwise specified	Mar. 30, 2014	Mar. 31, 2013
Bond Maturities by Period [Abstract]
March 30, 2014	$ 11,187	$ 12,307
March 30, 2014	5,214
March 30, 2014	4,792
March 30, 2014	1,181
March 30, 2014	$ 0