Restructuring Charges - Changes in Restructuring Reserves (Detail) - Severance and Other Employee Related Costs $ in Thousands	12 Months Ended
Dec. 29, 2018 USD ($)
Restructuring Cost and Reserve [Line Items]
Provision for restructuring reserves	$ 95
Cash payments made	$ (95)

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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