Information Concerning Product Lines, Geographic Information and Revenue Concentration - Schedule of Revenue by Product Line (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jul. 03, 2016	Jun. 28, 2015	Jul. 03, 2016	Jun. 28, 2015
Revenue from External Customer [Line Items]
Total revenue	$ 2,717	$ 4,973	$ 5,667	$ 11,132
New products
Revenue from External Customer [Line Items]
Total revenue	1,197	2,953	2,689	7,097
Mature products
Revenue from External Customer [Line Items]
Total revenue	$ 1,520	$ 2,020	$ 2,978	$ 4,035

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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=26872669&loc=d3e20235-122688

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