Segment - Geographic Information (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 27, 2020	Mar. 29, 2019
Segment Reporting Information [Line Items]
Net Revenue	[1]	$ 78,417	$ 80,106
UNITED STATES
Segment Reporting Information [Line Items]
Net Revenue	[1]	34,403	30,115
Other countries
Segment Reporting Information [Line Items]
Net Revenue	[1]	$ 44,014	$ 49,991

[1] Revenue is attributed to countries based on the location of the customer.