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Income Taxes - Reconciliation of Income Tax Expense (Benefit) at the Statutory Federal Rate (Details)	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Income Tax Disclosure [Abstract]
Statutory federal income tax	21.00%	21.00%	35.00%
State income taxes, net of federal benefit	3.60%	3.30%	2.50%
Stock-based compensation	(4.30%)	(1.10%)	(1.50%)
R&D tax credits	(2.20%)	(2.00%)	(1.10%)
Changes in unrecognized tax benefits	(0.50%)	1.20%	(0.60%)
Manufacturing deduction	0.00%	0.00%	(3.50%)
Tax Cuts and Jobs Act effects	0.00%	(3.90%)	(1.90%)
Other	1.00%	1.10%	(0.40%)
Effective income tax rate	18.60%	19.60%	28.50%

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Effective income tax rate reconciliation employee share based payments.

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Effective income tax rate reconciliation tax cuts and jobs act of 2017.

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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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Percentage 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 deduction for qualified production activity.

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Percentage 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 research tax credit.

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