Segment Information (Schedule Of Revenue From External Customers Attributed To Foreign Countries By Geographic Area) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 29, 2012 segment	Dec. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 14,373	$ 14,066	$ 46,351	$ 49,084
Number of Reportable Segments			1
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	4,137	3,358	12,790	12,440
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	4,190	5,310	13,739	16,881
Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	2,073	1,369	5,393	3,198
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	465	624	3,197	3,216
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	1,456	1,221	4,762	4,633
Singapore [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	1,560	1,662	4,863	6,863
Asia (Excluding China, Korea, Japan And Singapore) [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	474	458	1,313	1,602
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 18	$ 64	$ 294	$ 251