Certain Balance Sheet Components - Narratives (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Condensed Financial Statements, Captions [Line Items]
Income Taxes Receivable		$ 23,200
Income Taxes Receivable, Current	[1]	7,343	$ 7,305
Income Taxes Receivable, Noncurrent		15,899	19,249
TVN [Member]
Condensed Financial Statements, Captions [Line Items]
Proceeds from Income Tax Refunds		6,400	$ 6,400
Income Taxes Receivable		23,200
Prepaid Expenses and Other Current Assets [Member]
Condensed Financial Statements, Captions [Line Items]
Income Taxes Receivable, Current	[1]	7,343
Other Noncurrent Assets [Member]
Condensed Financial Statements, Captions [Line Items]
Income Taxes Receivable, Noncurrent		$ 15,899

[1] The Company’s 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 year ended December 31, 2019 and 2018, the French government approved the 2015 and 2014 claims and refunded $6.4 million to the French Subsidiary in each of the periods, respectively. The remaining R&D tax credits receivable at December 31, 2019 were approximately $23.2 million and are expected to be recoverable from 2020 through 2023 with $7.3 million reported as a component of “Prepaid and other Current Assets” and $15.9 million reported as a component of “Other Long-term Assets” on the Company’s Consolidated Balance Sheets.