Segment Information Segment - Market Information (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 26, 2020	Jun. 28, 2019	Jun. 26, 2020	Jun. 28, 2019
Revenue from External Customer [Line Items]
Net Revenue	[1]	$ 73,994	$ 84,865	$ 152,411	$ 164,971
Service Provider [Member]
Revenue from External Customer [Line Items]
Net Revenue		42,169	43,438	85,928	87,650
Broadcast and Media [Member]
Revenue from External Customer [Line Items]
Net Revenue		$ 31,825	$ 41,427	$ 66,483	$ 77,321

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