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Business Segment and Geographic Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 28, 2013 segment	Dec. 29, 2012	Dec. 31, 2011
Business Segment and Geographic Information
Number of business segments									1
Business segment and geographic information
Revenue	$ 75,672	$ 74,427	$ 65,203	$ 63,130	$ 67,533	$ 65,912	$ 67,813	$ 69,132	$ 278,432	$ 270,390	$ 305,228
Long-lived assets (property and equipment, net)	15,655				17,980				15,655	17,980
United States
Business segment and geographic information
Revenue									216,815	207,779	224,661
Long-lived assets (property and equipment, net)	13,657				15,442				13,657	15,442
United Kingdom
Business segment and geographic information
Revenue									46,987	51,059	58,426
Long-lived assets (property and equipment, net)	1,911				2,452				1,911	2,452
Other
Business segment and geographic information
Revenue									14,630	11,552	22,141
Long-lived assets (property and equipment, net)	87				86				87	86
Total foreign
Business segment and geographic information
Revenue									61,617	62,611	80,567
Long-lived assets (property and equipment, net)	$ 1,998				$ 2,538				$ 1,998	$ 2,538

X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

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- Definition

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.13)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 13

-Subparagraph a

-Article 5



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 8

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- Definition

Aggregate revenue during the period from services rendered in the normal course of business, after deducting allowances and discounts.

+ References

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(d))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



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