Note 5 - Fair Value (Details) - Cash, Cash Equivalents and Short-term Marketable Securities - USD ($) $ in Thousands	Sep. 27, 2015	Mar. 29, 2015	Sep. 28, 2014	Mar. 30, 2014
Cash and cash equivalents
Cash at financial institutions	$ 53,480	$ 55,227
Money market funds	4	6
Total cash and cash equivalents	$ 53,484	$ 55,233	$ 78,377	$ 14,614