Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018	Dec. 29, 2018
Income Taxes [Line Items]
Provision for income taxes	$ 6,000	$ 4,000
Unrecognized tax benefits			$ 1,200,000
Unrecognized tax benefits recognition impact on income tax rate			$ 0
Federal
Income Taxes [Line Items]
Income tax returns examination period	3 years
Minimum | State Jurisdictions
Income Taxes [Line Items]
Income tax returns examination period	3 years
Maximum | State Jurisdictions
Income Taxes [Line Items]
Income tax returns examination period	5 years