Note 4 - Balance Sheet Details (Details) - Property, Plant and Equipment (USD $) In Thousands, unless otherwise specified	Sep. 28, 2014	Mar. 30, 2014
Property, Plant and Equipment [Abstract]
Land	$ 6,660	$ 6,660
Building	17,284	16,787
Machinery and equipment	41,064	40,675
Software and licenses	17,836	17,549
Property, plant and equipment, total	82,844	81,671
Accumulated depreciation and amortization	(65,632)	(60,391)
Total property, plant and equipment, net	$ 17,212	$ 21,280