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Note 8 - Benefit Plans - Weighted Average Assumptions (Details) | 12 Months Ended
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Dec. 30, 2017 | Dec. 31, 2016 | Jan. 02, 2016
Foreign Plan [Member] |  |  |
Expected return on plan assets | 4.50% |  |
Pension Plan [Member] |  |  |
Discount rate | 3.00% | 3.70% |
Expected return on plan assets | 4.50% | 4.90% |
Compensation increase rate | 4.50% | 5.30% |
Measurement dates | Dec. 31, 2016 | Jan. 02, 2016 |
Discount rate | 3.10% | 2.60% | 3.80%
Compensation increase rate | 5.00% | 4.50% | 6.20%
Measurement dates | Dec. 30, 2017 | Dec. 31, 2016 | Jan. 02, 2016
Pension Plan [Member] | UNITED STATES |  |  |
Discount rate |  |  | 3.90%
Expected return on plan assets |  |  | 6.80%
Measurement dates |  |  | Dec. 27, 2014
Pension Plan [Member] | Foreign Plan [Member] |  |  |
Discount rate |  |  | 3.70%
Expected return on plan assets |  |  | 5.10%
Compensation increase rate |  |  | 5.30%
Measurement dates |  |  | Dec. 27, 2014

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- Definition Dates used to measure benefit obligation. + References No definition available. + Details
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- Definition The date(s) used to measure net periodic benefit cost . + References No definition available. + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Weighted average rate increase of compensation, used to determine benefit obligation of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(2) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Weighted average rate of compensation increase used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(2) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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