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Income Taxes - Tax Benefits (Details) - USD ($) | 12 Months Ended
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Dec. 30, 2018 | Dec. 31, 2017
Income Taxes |  |
Balance at the beginning of the period | $ 2,028,000 | $ 4,827,000
Additions for tax positions of current year | 510,000 | 134,000
Reductions for tax positions of prior years | (515,000) | (2,862,000)
Reductions for lapse of statute of limitations |  | (71,000)
Balance at the end of the period | 2,023,000 | 2,028,000
Interest (expense) benefit included in income tax expense | (39,000) | 416,000
Income tax expense, accrued interest and penalties | $ 165,000 | $ 124,000

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