Note 6 - Fair Value (Details) - Amortized Cost and Estimated Fair Value of Cash Equivalents and Marketable Securities (USD $) In Thousands, unless otherwise specified	Mar. 30, 2014	Mar. 31, 2013
Amortized Cost and Estimated Fair Value of Cash Equivalents and Marketable Securities [Abstract]
Less than 1 year	$ 49,539	$ 61,011
Less than 1 year	49,504	61,029
Due in 1 to 5 years	107,741	134,289
Due in 1 to 5 years	107,552	134,600
Total	157,280	195,300
Total	$ 157,056	$ 195,629