Selected Quarterly Financial Data Selected Quarterly Financial Data - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 27, 2019	Jun. 28, 2019	Mar. 29, 2019	Dec. 31, 2018	Sep. 28, 2018	Jun. 29, 2018	Mar. 30, 2018	Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Income Tax Contingency [Line Items]
Gross Margin Percentage	50.50%	65.30%	51.80%	52.20%	53.10%	49.80%	52.00%
Revenue	$ 122,178	$ 115,725	$ 84,865	$ 80,106	$ 113,655	$ 100,616	$ 99,160	$ 90,127	$ 402,874	[1]	$ 403,558	[1]	$ 358,246	[1]
One-time benefit due to changes in Company's global tax structure					2,000				2,000
Benefit from a Valuation Allowance Release									923		$ (1,449)		$ 2,834
Foreign Tax Authority [Member]
Income Tax Contingency [Line Items]
Benefit from a Valuation Allowance Release					$ 1,000
Foreign Tax Authority [Member]
Income Tax Contingency [Line Items]
Benefit from a Valuation Allowance Release				$ 800					$ 800
Comcast CableOS Software License Agreement [Member]
Income Tax Contingency [Line Items]
Revenue		$ 37,500

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