Note 5 - Investment Assets Measured at Fair Value (Details) - USD ($) $ in Thousands	Jul. 03, 2016	Mar. 27, 2016	Jun. 28, 2015	Mar. 29, 2015
Fair Value, Inputs, Level 1 [Member]
Investment Assets	$ 36,323	$ 4
Cash in financial institutions	48,953	55,066
Total cash and cash equivalents	$ 85,276	$ 55,070	$ 55,760	$ 55,233