Employee Benefit Plans (Details 2) - USD ($) $ in Thousands	12 Months Ended
Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Swiss Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Current year actuarial gain (loss) on plan assets	$ 97	$ (8)	$ 61
Current year actuarial loss on benefit obligation	(645)	(269)	(699)
Actuarial income (loss) recorded in current year	65	(98)	57
Prior service credit	126	(6)	64
Effect of curtailments	3	0	0
Change in other comprehensive income (loss)	(354)	(381)	(517)
Japan Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amortization of net transition obligation	7	8	7
Amortization of actuarial gain (loss)	(1)	25	(21)
Actuarial income (loss) recorded in current year	(19)	(40)	(10)
Change in other comprehensive income (loss)	$ (13)	$ (7)	$ (24)

Amount represents Effect of curtailments.

No definition available.

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- Definition

Represent other comprehensive income loss actuarial gain loss of current year.

+ References

No definition available.

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- Definition

Reflects the amount of actuarial gain (loss) on benefit obligations of current year.

+ References

No definition available.

+ Details

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- Definition

Reflects the amount of actuarial gain (loss) on plan assets of current year.

+ References

No definition available.

+ Details

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- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

+ References

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount, after tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan, attributable to parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 19
-URI http://asc.fasb.org/extlink&oid=96868048&loc=SL4569616-111683

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- Definition

Amount, after tax, of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) of defined benefit plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e689-108580

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- Definition

Amount, after tax, of reclassification adjustment from accumulated other comprehensive income (loss) for transition asset (obligation) of defined benefit plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (i)
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