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Acquisitions (Intangible Assets Acquired) (Details) £ in Thousands, $ in Thousands			12 Months Ended
	May 01, 2017 USD ($)	Apr. 06, 2017 GBP (£)	Dec. 28, 2018	Dec. 29, 2017
Jibe Consulting, Inc [Member]
Business Acquisition [Line Items]
Amount | $	$ 931
Jibe Consulting, Inc [Member] | Customer Base [Member]
Business Acquisition [Line Items]
Amount | $	140
Useful Life (in years)				5 years
Jibe Consulting, Inc [Member] | Customer Backlog [Member]
Business Acquisition [Line Items]
Amount | $	325
Useful Life (in years)				2 years
Jibe Consulting, Inc [Member] | Non-Compete [Member]
Business Acquisition [Line Items]
Amount | $	$ 466
Useful Life (in years)				5 years
Aecus Limited [Member]
Business Acquisition [Line Items]
Amount | £		£ 1,515
Aecus Limited [Member] | Customer Base [Member]
Business Acquisition [Line Items]
Amount | £		455
Useful Life (in years)			5 years
Aecus Limited [Member] | Customer Backlog [Member]
Business Acquisition [Line Items]
Amount | £		52
Useful Life (in years)			2 years
Aecus Limited [Member] | Non-Compete [Member]
Business Acquisition [Line Items]
Amount | £		£ 1,008
Useful Life (in years)			5 years

X

- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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- Definition

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 of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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