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Business Segment and Geographic Information (Tables) | 12 Months Ended
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Dec. 30, 2017
Business Segment and Geographic Information |
Schedule of revenue and long-lived assets by country, based on the physical location of the operation to which the revenues or the assets relate | Revenue based on the physical location of the operation to which the revenues relate, are as follows (in thousands):
|  | Fiscal Year |  | Fiscal Year |  | Fiscal Year |
|  | 2017 (52 weeks) |  | 2016 (52 weeks) |  | 2015 (52 weeks) |
Revenue: |  |  |  |  |  |  |  |  |  |
United States |  | $ | 295,232 |  | $ | 251,962 |  | $ | 243,261 |
United Kingdom |  |  | 53,644 |  |  | 52,509 |  |  | 44,248 |
Other |  |  | 21,199 |  |  | 20,308 |  |  | 16,050 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total foreign |  |  | 74,843 |  |  | 72,817 |  |  | 60,298 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  | $ | 370,075 |  | $ | 324,779 |  | $ | 303,559 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  | December 30, 2017 |  | December 31, 2016 |
Long-lived assets (property and equipment, net): |  |  |  |  |  |  |
United States |  | $ | 37,192 |  | $ | 30,735 |
United Kingdom |  |  | 5,552 |  |  | 5,253 |
Other |  |  | 1,899 |  |  | 393 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total foreign |  |  | 7,451 |  |  | 5,646 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  | $ | 44,643 |  | $ | 36,381 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

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- Definition Tabular disclosure of information concerning material long-lived assets (excluding financial instruments, customer relationships with financial institutions, mortgage and other servicing rights, deferred policy acquisition costs, and deferred taxes assets) located in identified geographic areas and/or the amount of revenue from external customers attributed to that country from which revenue is material. An entity may also provide subtotals of geographic information about groups of countries. + 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) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9038-108599 + Details
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