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Note 16 - Enterprise-wide Disclosures - Operating Segments Depreciation, Amortization, and Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Jan. 01, 2017 | Jan. 03, 2016
Depreciation and amortization | $ 30,261 | $ 30,632 | $ 30,803
Total assets | 800,600 | 835,439 |
Operating Segments [Member] |  |  |
Depreciation and amortization | 28,259 | 29,066 | 29,564
Total assets | 719,957 | 737,399 |
Corporate, Non-Segment [Member] |  |  |
Depreciation and amortization | 2,002 | 1,566 | 1,239
Total assets | $ 80,643 | $ 98,040 |

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(12)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(11)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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