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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.

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