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Note 10 - Income Taxes (Details Textual) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 28, 2020 | Mar. 30, 2019 | Dec. 28, 2019
Income Tax Expense (Benefit), Total | $ 444 | $ 234 |
Unrecognized Tax Benefits, Ending Balance | 2,300 |  |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total | 500 |  |
Decrease in Unrecognized Tax Benefits is Reasonably Possible | 2,800 |  |
Deferred Tax Liabilities, Net, Total | 24,800 |  |
Other Noncurrent Liabilities [Member] |  |  |
Liability for Uncertainty in Income Taxes, Noncurrent | $ 24,300 |  | $ 24,600
Domestic Tax Authority [Member] |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% |  |
Foreign Tax Authority [Member] |  |  |
Deferred Tax Assets, Valuation Allowance, Total | $ 0 |  |
Foreign Tax Authority [Member] | Office of the Tax Commissioner, Bermuda [Member] |  |  |
Income Tax Expense (Benefit), Total |  | $ 0 |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 0.00% | 0.00% |

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