Segment Reporting and Geographic Data - Geographic Areas Long Lived Assets (Detail) - USD ($) $ in Thousands		Sep. 30, 2020	Dec. 28, 2019
Geographic Areas, Long-Lived Assets [Abstract]
Long-lived assets	[1]	$ 4,690	$ 4,792
United States [Member]
Geographic Areas, Long-Lived Assets [Abstract]
Long-lived assets	[1]	4,093	4,007
All Other Countries [Member]
Geographic Areas, Long-Lived Assets [Abstract]
Long-lived assets	[1]	$ 597	$ 785

[1] The Company’s only long-lived assets consist of property and equipment, net of depreciation, which are categorized based on their location of domicile.