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Note 8 - Intangible Assets (Tables) | 3 Months Ended
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Mar. 28, 2020
Notes Tables |
Finite-lived Intangible Assets Amortization Expense [Table Text Block] |
|  | Three Months Ended |
|  | March 28, |  |  | March 30, |
(In thousands) |  | 2020 |  |  | 2019 |
Research and development |  | $ | 14 |  |  | $ | 14 |
Amortization of acquired intangible assets |  |  | 2,640 |  |  |  | 3,389 |
|  | $ | 2,654 |  |  | $ | 3,403 |

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- Definition Tabular disclosure of amortization expense of assets, excluding financial assets, that lack physical substance, having a limited useful life. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration