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Note 15 - Income Taxes (Details Textual) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 04, 2020 | Sep. 29, 2019 | Oct. 04, 2020 | Sep. 29, 2019
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  |  | 21.00% | 21.00%
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent |  |  | 30.00% | 30.00%
Income Tax Expense (Benefit), Total | $ (3,239,000) | $ 32,000 | $ (3,103,000) | $ 148,000
Foreign Tax Authority [Member] | Mexican Tax Authority [Member] |  |  |  |
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount | $ (3,257,000) |  |  |
Income Tax Expense (Benefit), Total |  |  | $ (3,257,000) |

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