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Note 15 - Income Taxes (Details Textual) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 30, 2017 | Mar. 31, 2019 | Dec. 29, 2018 | Dec. 30, 2017
Effective Income Tax Rate Reconciliation, Percent, Total |  |  | 30.50% | 920.40%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 35.00% |  | 21.00% | 34.00%
Income Tax Expense (Benefit), Total |  |  | $ 1,193 | $ (2,255)
Effective Income Tax Rate Reconciliation, Tax Credit, Amount, Total |  |  | 341 | 603
Effective Income Tax Rate Reconciliation, NOL Adjustments and Repatriation Taxes, Amount |  |  | 730 | 198
Effective Income Tax Rate Reconciliation, Operating Loss Carryforwards Adjustments |  |  | 700 |
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount, Total |  |  | 49 | 458
Effective Income Tax Rate Reconciliation, Deduction, Amount, Total |  |  |  | 2,861
Foreign Income Tax Expense (Benefit), Continuing Operations, Total |  |  |  | 400
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability |  |  | 1,000 | $ 1,000
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount |  |  | 200 |
Domestic Tax Authority [Member] |  |  |  |
Operating Loss Carryforwards, Total |  |  | $ 3,600 |
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] |  |  |  |
Income Tax Examination, Year under Examination |  |  | 2011 2012 2013 2015 2016 2017 |
State and Local Jurisdiction [Member] |  |  |  |
Operating Loss Carryforwards, Total |  |  | $ 7,900 |
State and Local Jurisdiction [Member] | New Jersey Division of Taxation [Member] |  |  |  |
Income Tax Examination, Year under Examination |  |  | 2009 2010 2011 2012 |
Foreign Tax Authority [Member] |  |  |  |
Operating Loss Carryforwards, Total |  |  | $ 300 |
Foreign Tax Authority [Member] | Ministry of Finance, Republic of Serbia [Member] |  |  |  |
Dividend Tax Rate on Repatriation of Cash to Domestic Country |  |  | 5.00% |
Scenario, Forecast [Member] |  |  |  |
Income Tax Expense (Benefit), Total |  | $ 600 |  |

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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to NOL adjustments and repatriation taxes. + References No definition available. + Details
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- Definition Amount of the difference between reported income tax expense (Benefit) And expected income tax expense (Benefit) Computed by applying the domestic federal statutory income tax rates to pretax income (Loss) From continuing operations attributable to operating loss carryforwards adjustments. + References No definition available. + Details
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