Segment and Geographic Information (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jul. 01, 2012	Jul. 03, 2011
Net sales by Product and Geographic area
Total net sales	$ 29,251	$ 36,978
United States [Member]
Net sales by Product and Geographic area
Total net sales	6,192	9,119
China [Member]
Net sales by Product and Geographic area
Total net sales	9,990	12,551
Singapore [Member]
Net sales by Product and Geographic area
Total net sales	4,036	3,888
Germany [Member]
Net sales by Product and Geographic area
Total net sales	3,038	4,453
Europe (excluding Germany) [Member]
Net sales by Product and Geographic area
Total net sales	1,105	1,672
Rest of world [Member]
Net sales by Product and Geographic area
Total net sales	$ 4,890	$ 5,295