Revenue, Product and Geographic Information Revenue from Geographic Location table (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Dec. 29, 2018	Dec. 30, 2017	Dec. 29, 2018	Dec. 30, 2017
Revenue from External Customer [Line Items]
Revenues	$ 67,942	$ 110,840	$ 264,483	$ 254,491
Asia [Member]
Revenue from External Customer [Line Items]
Revenues	56,748	103,069	232,448	233,685
Americas [Member]
Revenue from External Customer [Line Items]
Revenues	5,067	2,431	14,545	9,537
Europe [Member]
Revenue from External Customer [Line Items]
Revenues	$ 6,127	$ 5,340	$ 17,490	$ 11,269

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration