Note 4 - Balance Sheet Details (Details) - Property, Plant and Equipment (USD $) In Thousands, unless otherwise specified	Jun. 29, 2014	Mar. 30, 2014
Property, Plant and Equipment [Abstract]
Land	$ 6,660	$ 6,660
Building	17,287	16,787
Machinery and equipment	43,108	40,675
Software and licenses	17,815	17,549
Property, plant and equipment, total	84,870	81,671
Accumulated depreciation and amortization	(64,226)	(60,391)
Total property, plant and equipment, net	$ 20,644	$ 21,280