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Note 9 - Income Taxes - Effective Consolidated Tax Rate (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 26, 2016
Jun. 28, 2015
Jun. 26, 2016
Jun. 28, 2015
Income Before Income Taxes (a)     $ 844 $ 1,479
Income Tax Expense (Benefit) $ 33 $ 71 $ 121 $ 182
Effective Income Tax Rate (b/a)     14.30% 12.30%