Segment and Geographic Information Gross Profit by Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 01, 2016	Sep. 26, 2015	Oct. 01, 2016	Sep. 26, 2015
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gross Profit	$ 10,980	$ 18,421	$ 31,788	$ 33,798
Component Processing [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gross Profit	11,512	13,387	33,770	27,497
Micromachining [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gross Profit	(168)	5,473	(153)	7,135
Corporate and Other [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gross Profit	$ (364)	$ (439)	$ (1,829)	$ (834)