Income Taxes Income Tax Reconciliation, Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Tax Cuts and Jobs Act Narrative [Abstract]
Federal statutory rate	21.00%	35.00%	35.00%
Federal Statutory Income Tax Rate Effective January 1, 2018	21.00%
Tax reform	$ 0	$ 1,749	$ 0
Increase in the Valuation Allowance Related to the Revised Treatment of Net Operating Losses Under the Tax Act		6,420
Deferred Tax Liabilities, Net	568	1,105
Income tax provision (benefit)	831	$ (7,509)	3,622
Effective Income Tax Rate Reconciliation, Percent		36.40%
Tax Reconciliation Details [Abstract]
Change in valuation allowance	3,990	$ 6,470	106
Income taxes paid, net of tax refunds	$ 20	$ 44	$ (190)

Federal Statutory Income Tax Rate Effective January 1, 2018

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Increase in the Valuation Allowance Related to the Revised Treatment of Net Operating Losses Under the Tax Act

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Tax Reconciliation Details [Abstract]

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Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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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 increase (decrease) in the valuation allowance for deferred tax assets.

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