Segment Information (Schedule of Net Revenue by Geographic Areas) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Segment Reporting Information [Line Items]
Revenue	$ 110,236	$ 106,116	$ 242,318	$ 247,594
United States (“U.S.”)
Segment Reporting Information [Line Items]
Revenue	73,826	81,441	166,273	184,733
Americas (excluding U.S.)
Segment Reporting Information [Line Items]
Revenue	2,035	4,121	10,717	9,759
EMEA
Segment Reporting Information [Line Items]
Revenue	28,010	13,002	46,846	37,370
APAC
Segment Reporting Information [Line Items]
Revenue	$ 6,365	$ 7,552	$ 18,482	$ 15,732