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Note 13 - Income Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 28, 2015 | Jun. 29, 2014 | Jun. 28, 2015 | Jun. 29, 2014 | Dec. 28, 2014
Note 13 - Income Taxes (Details) [Line Items] |  |  |  |  |
Income Tax Expense (Benefit) | $ 17 | $ 0 | $ 172 | $ 0 |
Effective Income Tax Rate Reconciliation, Percent |  |  | (9.90%) | 0.00% |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  |  | 35.00% | 35.00% |
Income Taxes Receivable | $ 2,100 |  | $ 2,100 |  | $ 2,200
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] | Earliest Tax Year [Member] |  |  |  |  |
Note 13 - Income Taxes (Details) [Line Items] |  |  |  |  |
Income Tax Examination, Year under Examination |  |  | 2009 |  |
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] | Latest Tax Year [Member] |  |  |  |  |
Note 13 - Income Taxes (Details) [Line Items] |  |  |  |  |
Income Tax Examination, Year under Examination |  |  | 2013 |  |
State and Local Jurisdiction [Member] | California Franchise Tax Board [Member] | Tax Year 2010 [Member] |  |  |  |  |
Note 13 - Income Taxes (Details) [Line Items] |  |  |  |  |
Income Tax Examination, Year under Examination | 2010 |  |  |  |

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