Income Taxes - Textual (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015	Dec. 27, 2014
Operating Loss Carryforwards [Line Items]
Change in amount of operating loss carryforwards valuation allowance		$ 1,500	$ (25,800)
Increase in valuation allowance for deferred tax assets		$ 300
Federal corporate tax rate		35.00%
Provisional estimate for income taxes		$ 600
Maximum amount company recognize from unrecognized tax benefit		7,151	$ 6,477	$ 6,961	$ 6,442
Unrecognized tax benefits that would impact effective tax rate if recognized		4,000
Scenario, Forecast [Member]
Operating Loss Carryforwards [Line Items]
Federal corporate tax rate	21.00%
California [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		25,600
State research and experimental tax credit carryforward		8,900
Other States [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		3,000
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		35,000
Federal [Member]
Operating Loss Carryforwards [Line Items]
State research and experimental tax credit carryforward		$ 7,000