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Stock-Based Compensation (Details 1) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2016	Jul. 03, 2015	Jul. 01, 2016	Jul. 03, 2015
Schedule of Employee Service Share-based Compensation [Line Items]
Allocated Share-based Compensation Expense	$ 300	$ 829	$ 7,758	$ 1,823
Amounts capitalized as part of inventory	36	129	188	251
Total	336	958	7,946	2,074
Cost of Sales [Member]
Schedule of Employee Service Share-based Compensation [Line Items]
Allocated Share-based Compensation Expense	0	6	560	23
General and administrative [Member]
Schedule of Employee Service Share-based Compensation [Line Items]
Allocated Share-based Compensation Expense	167	548	3,688	1,124
Marketing and selling [Member]
Schedule of Employee Service Share-based Compensation [Line Items]
Allocated Share-based Compensation Expense	68	104	1,471	355
Research and development [Member]
Schedule of Employee Service Share-based Compensation [Line Items]
Allocated Share-based Compensation Expense	$ 65	$ 171	$ 2,039	$ 321

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- Definition

Line items represent the schedule of employee service share-based compensation.

+ References

No definition available.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Section 50
-Paragraph 1
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+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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Amount of capitalized and expensed compensation cost from equity-based compensation arrangements.

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