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Note 15 - Income Taxes (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 27, 2020 | Jun. 29, 2019 | Mar. 30, 2019 | Jun. 27, 2020 | Jun. 29, 2019
Income Tax Expense (Benefit), Total | $ (408) | $ 459 |  | $ (2,648) | $ 185
Income Tax Expense (Benefit), Total |  |  | $ 600 |  |
Effective Income Tax Rate Reconciliation, Percent, Total |  |  |  | 27.60% | 27.10%
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] |  |  |  |  |
Effective Income Tax Rate Reconciliation, Percent, Total |  |  |  | 26.90% | 28.60%
Domestic Tax Authority [Member] | Canada Revenue Agency [Member] |  |  |  |  |
Effective Income Tax Rate Reconciliation, Percent, Total |  |  |  | 27.30% | 26.50%
Domestic Tax Authority [Member] | Ministry of Finance, Republic of Serbia [Member] |  |  |  |  |
Effective Income Tax Rate Reconciliation, Percent, Total |  |  |  | 15.30% | 15.00%

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