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Note 15 - Income Taxes (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 03, 2021 | Jun. 27, 2020 | Jul. 03, 2021 | Jun. 27, 2020
Income Tax Expense (Benefit), Total | $ 486 | $ (408) | $ 842 | $ (2,648)
Effective Income Tax Rate Reconciliation, Percent, Total |  |  | 26.90% | 27.60%
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] |  |  |  |
Effective Income Tax Rate Reconciliation, Percent, Total |  |  | 28.00% | 26.90%
Foreign Tax Authority [Member] | Canada Revenue Agency [Member] |  |  |  |
Effective Income Tax Rate Reconciliation, Percent, Total |  |  | 26.40% | 27.30%
Foreign Tax Authority [Member] | Ministry of Finance, Republic of Serbia [Member] |  |  |  |
Effective Income Tax Rate Reconciliation, Percent, Total |  |  | 15.20% | 15.30%

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