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Note 16 - Enterprise-wide Disclosures - Revenue and Long-lived Assets (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Oct. 01, 2017 | Jul. 02, 2017 | Apr. 02, 2017 | [2] | Jan. 01, 2017 | Oct. 02, 2016 | Jul. 03, 2016 | Apr. 03, 2016 | Dec. 31, 2017 | Jan. 01, 2017 | Jan. 03, 2016
Net sales |  | $ 266,210 | [1] | $ 257,431 | $ 251,700 | $ 221,102 | $ 239,507 | [3] | $ 248,349 | $ 248,207 | $ 222,554 | $ 996,443 | [4] | $ 958,617 | [4] | $ 1,001,863 | [4]
Long-lived assets | [5] | 212,645 |  |  |  |  | 204,508 |  |  |  |  | 212,645 |  | 204,508 |  |  |
UNITED STATES |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales | [4] |  |  |  |  |  |  |  |  |  |  | 514,783 |  | 501,206 |  | 520,375 |
Long-lived assets | [5] | 76,557 |  |  |  |  | 79,365 |  |  |  |  | 76,557 |  | 79,365 |  |  |
UNITED KINGDOM |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales | [4] |  |  |  |  |  |  |  |  |  |  | 57,391 |  | 58,266 |  | 72,445 |
Long-lived assets | [5] | 7,902 |  |  |  |  | 8,122 |  |  |  |  | 7,902 |  | 8,122 |  |  |
AUSTRALIA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales | [4] |  |  |  |  |  |  |  |  |  |  | 87,591 |  | 78,141 |  | 76,600 |
Long-lived assets | [5] | 45,067 |  |  |  |  | 44,209 |  |  |  |  | 45,067 |  | 44,209 |  |  |
Other Foreign Countries [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales | [4] |  |  |  |  |  |  |  |  |  |  | 336,678 |  | 321,004 |  | 332,443 |
Long-lived assets | [5] | 3,083 |  |  |  |  | 2,585 |  |  |  |  | 3,083 |  | 2,585 |  |  |
NETHERLANDS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | [5] | 55,132 |  |  |  |  | 43,907 |  |  |  |  | 55,132 |  | 43,907 |  |  |
THAILAND |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-lived assets |  | 16,543 |  |  |  |  | 16,645 |  |  |  |  | 16,543 |  | 16,645 |  |  |
CHINA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | [5] | $ 8,361 |  |  |  |  | $ 9,675 |  |  |  |  | $ 8,361 |  | $ 9,675 |  |  |
[1] | Results for the fourth quarter of 2017 include tax charges of $15.2 million as a result of the recently enacted U.S. Tax Cuts and Jobs Act.
[2] | Results for the first quarter of 2017 include restructuring and asset impairment charges of $7.3 million.
[3] | Results for the fourth quarter of 2016 include restructuring and asset impairment charges of $19.8 million.
[4] | Revenue attributed to geographic areas is based on the location of the customer.
[5] | Long-lived assets include tangible assets physically located in foreign countries.

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