Certain Balance Sheet Components Certain Balance Sheet Components - Narratives (Details) - USD ($) $ in Thousands		6 Months Ended
		Jul. 01, 2016	Dec. 31, 2016	Sep. 26, 2016	Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Income Taxes Receivable, Current	[1]		$ 5,895		$ 0
Prepaid Customer Incentive	[2]		1,162		$ 0
TVN [Member]
Condensed Financial Statements, Captions [Line Items]
Proceeds from Income Tax Refunds		$ 5,800
Research Tax Credit Carryforward [Member] | TVN [Member]
Condensed Financial Statements, Captions [Line Items]
Income Taxes Receivable, Noncurrent			25,700
Other Noncurrent Assets [Member] | Research Tax Credit Carryforward [Member] | TVN [Member]
Condensed Financial Statements, Captions [Line Items]
Income Taxes Receivable, Noncurrent			19,800
Prepaid Expenses and Other Current Assets [Member]
Condensed Financial Statements, Captions [Line Items]
Prepaid Warrants Incentive			1,200
Comcast Product Supply Agreement [Member]
Condensed Financial Statements, Captions [Line Items]
Warrants and Rights Outstanding				$ 1,600
Property Lease Guarantee [Member] | Other Noncurrent Assets [Member] | TVN [Member]
Condensed Financial Statements, Captions [Line Items]
Restricted Cash and Cash Equivalents			1,100
Sales Revenue, Goods, Net [Member] | Comcast Product Supply Agreement [Member]
Condensed Financial Statements, Captions [Line Items]
Warrants and Rights Outstanding			$ 400

[1] The Company’s acquired TVN subsidiary in France (the “TVN French Subsidiary”) participates in the French Crédit d’Impôt Recherche (“CIR”) program (the “R&D tax credits”) which allows companies to monetize eligible research expenses. The R&D tax credits can be used to offset against income tax payable to the French government in each of the four years after being incurred, or if not utilized, are recoverable in cash. The amount of R&D tax credits recoverable are subject to audit by the French government and during the second quarter of 2016, the French government approved the 2012 claim and refunded $5.8 million to the TVN French Subsidiary. The remaining R&D tax credit receivables at December 31, 2016 were approximately $25.7 million and are expected to be recoverable from 2017 through 2020 with $5.9 million reported under “Prepaid and other Current Assets” and $19.8 million reported under “Other Long-term Assets” on the Company’s Consolidated Balance Sheets.

[2] On September 26, 2016, the Company granted a warrant to purchase shares of common stock (the “Warrant”) to Comcast pursuant to which Comcast may, subject to certain vesting provisions. The Warrant issued to Comcast is considered an incentive for Comcast to purchase certain of the Company’s products. Therefore the value of the Warrant will be recorded as a reduction in the Company’s net revenues to the extent such value does not exceed net revenues from pertinent sales to Comcast. The portion of the Warrant which vested on September 26, 2016 had a value of $1.6 million and is deemed a customer incentive paid upfront and in the fourth quarter of 2016, $0.4 million of this prepaid incentive has been recorded as a reduction to the Company’s 2016 net revenues from Comcast and remaining $1.2 million of this prepaid incentive is recorded as an asset under “Prepaid expenses and other current assets” on the Company’s Consolidated Balance Sheet as of December 31, 2016.