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Note 6 - Restructuring (Details Textual) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 26, 2020 | Sep. 28, 2019 | Sep. 26, 2020 | Sep. 28, 2019 | Jun. 27, 2020
Q1 2020 Plan [Member] |  |  |  |  |
Restructuring and Related Costs, Incurred Cost, Total | $ 0.6 |  |  |  |
Restructuring and Related Cost, Cost Incurred to Date | 2.0 |  | $ 2.0 |  |
Q2 2019 Sales Plan [Member] |  |  |  |  |
Restructuring and Related Costs, Incurred Cost, Total | 0.1 | $ (0.1) | 0.1 | $ 2.3 |
Restructuring and Related Cost, Cost Incurred to Date |  |  |  |  | $ 2.0
June 2017 Plan [Member] |  |  |  |  |
Restructuring and Related Costs, Incurred Cost, Total | 2.0 | $ 0.4 | 2.1 | $ 2.4 |
Restructuring and Related Cost, Cost Incurred to Date | 21.2 |  | 21.2 |  |
June 2017 Plan [Member] | Minimum [Member] |  |  |  |  |
Restructuring and Related Cost, Expected Cost, Total | 22.0 |  | 22.0 |  |
June 2017 Plan [Member] | Maximum [Member] |  |  |  |  |
Restructuring and Related Cost, Expected Cost, Total | 23.5 |  | $ 23.5 |  |
June 2017 Plan [Member] | Vacated Facility [Member] |  |  |  |  |
Restructuring and Related Costs, Incurred Cost, Total | $ 1.9 |  |  |  |

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- Definition Amount of costs incurred to date for the specified restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(d)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(1)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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- Definition Amount expected to be recognized in earnings for the specified restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(1)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(d)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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