Segment Information Segment - Market Information (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 27, 2019	Sep. 28, 2018	Sep. 27, 2019	Sep. 28, 2018
Revenue from External Customer [Line Items]
Net Revenue	[1]	$ 115,725	$ 100,616	$ 280,696	$ 289,903
Service Provider [Member]
Revenue from External Customer [Line Items]
Net Revenue		77,886	66,737	165,536	173,096
Broadcast and Media [Member]
Revenue from External Customer [Line Items]
Net Revenue		$ 37,839	$ 33,879	$ 115,160	$ 116,807

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