Note 5 - Balance Sheet Details (Details) - Property, Plant and Equipment (USD $) In Thousands, unless otherwise specified	Mar. 30, 2014	Mar. 31, 2013
Property, Plant and Equipment [Abstract]
Land	$ 6,660	$ 6,660
Building	16,787	16,224
Machinery and equipment	40,675	42,258
Software and licenses	17,549	17,566
Property, plant and equipment, total	81,671	82,708
Accumulated depreciation and amortization	(60,391)	(58,608)
Total property, plant and equipment, net	$ 21,280	$ 24,100