Segment and Geographic Information Net Sales by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 01, 2016	Sep. 26, 2015	Oct. 01, 2016	Sep. 26, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 29,658	$ 46,472	$ 77,326	$ 89,563
Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	25,721	37,029	66,169	70,565
Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	2,236	6,805	5,254	13,161
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 1,701	$ 2,638	$ 5,903	$ 5,837