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Note 7 - Fair Value of Assets and Liabilities (Tables) | 12 Months Ended
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Dec. 30, 2017
Notes Tables |
Fair Value, Assets Measured on Recurring Basis [Table Text Block] |
|  | Fair Value Measurements Using |  |  |  |  |
(in thousands ) |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Investment in Polytronics |  | $ | 10,993 |  |  | $ | — |  |  | $ | — |  |  | $ | 10,993 |
|  | Fair Value Measurements Using |  |  |  |  |
(in thousands ) |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Investment in Polytronics |  | $ | 10,435 |  |  | $ | — |  |  | $ | — |  |  | $ | 10,435 |
Fair Value, by Balance Sheet Grouping [Table Text Block] |
|  | 2017 |  |  | 2016 |
(in thousands ) |  | Carrying Value |  |  | Estimated Fair Value |  |  | Carrying Value |  |  | Estimated Fair Value |
Euro Senior Notes, Series A due 2023 |  | $ | 139,623 |  |  | $ | 138,294 |  |  | $ | 122,313 |  |  | $ | 122,586 |
Euro Senior Notes, Series B due 2028 |  |  | 113,369 |  |  |  | 111,579 |  |  |  | 95,314 |  |  |  | 99,230 |
U .S. Senior Notes, Series A due 2022 |  |  | 25,000 |  |  |  | 24,737 |  |  |  | 25,000 |  |  |  | 24,746 |
U .S. Senior Notes, Series B due 2027 |  |  | 100,000 |  |  |  | 99,992 |  |  |  | 100,000 |  |  |  | 98,660 |
Details of Impairment of Long-Lived Assets Held and Used by Asset [Table Text Block] |
|  | Year Ended December 31, 2016 |  |  | As of December 31, 2016 |
(in thousands ) |  | Impairment Charge |  |  | Fair Value Measurement (Level 3) |  |  | Net Book Value |
Goodwill |  | $ | 8,794 |  |  | $ | — |  |  | $ | — |
Other intangible assets |  |  | 6,015 |  |  |  | 680 |  |  |  | 660 |
Total |  | $ | 14,809 |  |  | $ | 680 |  |  | $ | 660 |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Table Text Block] |
(in thousands , except rates data ) |  | Fair Value |  | Valuation Technique |  | Unobservable Inputs |  | Rates |
Tradename |  | $ | 680 |  | Relief from royalty |  | Discount rate: |  |  | 18% |
|  |  |  |  |  |  | R oyalty rate: |  |  | 1% |
Customer relationships |  | $ | — |  | Excess earnings |  | Discount rate: |  |  | 18% |
|  |  |  |  |  |  | Attrition rate: |  |  | 5% |

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- Definition Tabular disclosure for impairment of long-lived assets held and used by an entity which includes a description of the impaired long-lived asset and facts and circumstances leading to the impairment, aggregate amount of the impairment loss and where the loss is located in the income statement, method(s) for determining fair value, and the segment in which the impaired long-lived asset is reported. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84176398&loc=d3e2921-110230 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.CC) -URI http://asc.fasb.org/extlink&oid=27011434&loc=d3e125687-122742 + Details
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- Definition Tabular disclosure of the inputs and valuation techniques used to measure fair value, and a discussion of changes in valuation techniques and related inputs, if any, applied during the period to each separate class of assets, liabilities, and financial instruments classified in shareholders' equity that are measured on a recurring and/or nonrecurring basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13476-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13467-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=75026489&loc=d3e13220-108610 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 + Details
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