Segment Information (Schedule Of Property, Plant, And Equipment, Net, By Geographic Location) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Mar. 26, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	$ 66,978	$ 34,563
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	66,530	33,977
United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	20	29
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	158	117
Hong Kong [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	3	3
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	167	377
South Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	6	4
Taiwan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	83	44
Other Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	$ 11	$ 12