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Business Segment and Geographic Information (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 02, 2016 USD ($)	Oct. 03, 2015 USD ($)	Jul. 04, 2015 USD ($)	Apr. 04, 2015 USD ($)	Jan. 03, 2015 USD ($)	Sep. 27, 2014 USD ($)	Jun. 28, 2014 USD ($)	Mar. 29, 2014 USD ($)	Jan. 02, 2016 USD ($) segment	Jan. 03, 2015 USD ($)	Dec. 28, 2013 USD ($)
Business segment and geographic information
Number of business segments | segment									2
Revenues	$ 72,460	$ 76,525	$ 76,535	$ 78,039	$ 78,459	$ 73,483	$ 78,184	$ 76,245	$ 303,559	$ 306,371	$ 278,432
Long-lived assets (property and equipment, net)	31,338				14,696				31,338	14,696
United States
Business segment and geographic information
Revenues									243,261	238,466	216,815
Long-lived assets (property and equipment, net)	29,877				12,753				29,877	12,753
United Kingdom
Business segment and geographic information
Revenues									44,248	49,127	46,987
Long-lived assets (property and equipment, net)	1,075				1,595				1,075	1,595
Other
Business segment and geographic information
Revenues									16,050	18,778	14,630
Long-lived assets (property and equipment, net)	386				348				386	348
Total foreign
Business segment and geographic information
Revenues									60,298	67,905	$ 61,617
Long-lived assets (property and equipment, net)	$ 1,461				$ 1,943				$ 1,461	$ 1,943

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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 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 2: 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 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
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Aggregate revenue during the period from services rendered in the normal course of business, after deducting allowances and discounts.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-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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-Number 210
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