SEGMENT INFORMATION - Geographic Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2021	Sep. 25, 2020	Oct. 01, 2021	Sep. 25, 2020
Segment Reporting Information [Line Items]
Net revenue	$ 126,321	$ 94,892	$ 351,345	$ 247,303
United States
Segment Reporting Information [Line Items]
Net revenue	64,451	44,933	192,840	114,559
Other countries
Segment Reporting Information [Line Items]
Net revenue	$ 61,870	$ 49,959	$ 158,505	$ 132,744