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Business Segment and Geographic Information (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
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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 |

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- 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 No definition available. + Details
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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 -Article 7 + Details
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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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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