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Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) ReportingUnit segment Customer | Dec. 31, 2019 USD ($) Customer | Dec. 31, 2018 USD ($)
Cash and cash equivalents maximum maturity |  | three months |  |
Investments in Equity Securities of Privately Held Companies |  | $ 3,600 | $ 3,600 |
Capitalized Software Development Costs for Software Sold to Customers |  | 2,300 | 1,100 | $ 900
Hosting Arrangement, Service Contract, Implementation Cost, Capitalized, before Accumulated Amortization |  |  | 3,600 |
Goodwill |  | $ 243,674 | 239,780 | 240,618
Number of reporting units | ReportingUnit |  | 2 |  |
Goodwill, Impairment Loss |  | $ 0 |  |
Impairment of Intangible Assets, Finite-lived |  | 0 | 0 | 0
Advertising expense |  | $ 1,100 | 700 | 1,000
Net Accumulated Gain or Loss as a Percentage of Projected Plan Benefit Obligation |  | 10.00% |  |
More Likely Than Not Threshold Recognition of Uncertain Tax Position |  | 50.00% |  |
Number of reportable segments | segment |  | 2 |  |
Furniture and Fixtures [Member] |  |  |  |
Property, plant and equipment estimated useful life |  | 5 years |  |
Internal Use Software [Member] |  |  |  |
Property, plant and equipment estimated useful life |  | 3 years |  |
Machinery and Equipment [Member] |  |  |  |
Property, plant and equipment estimated useful life |  | 4 years |  |
Leasehold Improvements [Member] |  |  |  |
Property, plant and equipment leasehold improvements useful lives |  | shorter of the remaining useful lives of the assets or the lease term of the respective assets |  |
Leaseholds and Leasehold Improvements [Member] | Minimum [Member] |  |  |  |
Lessee, Operating Lease, Term of Contract |  | 1 year |  |
Leaseholds and Leasehold Improvements [Member] | Maximum [Member] |  |  |  |
Lessee, Operating Lease, Term of Contract |  | 10 years |  |
Capitalized software [Member] |  |  |  |
Property, plant and equipment estimated useful life |  | 3 years |  |
Foreign Exchange Forward [Member] |  |  |  |
Derivative, Term of Contract |  | 3 months |  |
Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument, Trading [Member] |  |  |  |
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net |  | $ 0 |  |
TVN [Member] |  |  |  |
Research and Development Tax Credits Receivables from French Government |  | 4,500 | 4,700 | 5,900
Other Expense [Member] |  |  |  |
Remeasurement Losses, Reporting Currency Denominated, Value |  | $ 1,000 | $ 1,500 | $ 600
Forecast [Member] |  |  |  |
Defined Benefit Plan, Actuarial Gain (Loss), Immediate Recognition as Component in Net Periodic Benefit (Cost) Credit | $ 0 |  |  |
Comcast [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member] |  |  |  |
Number Of Customers Accounting For More Than Ten Percent of Net Accounts Receivable | Customer |  | 1 | 1 |
Entity-wide revenue, major customer, revenue or accounts receivable percentage |  | 10.00% | 10.00% |
Comcast [Member] | Net Revenue [Member] |  |  |  |
Entity-wide revenue, major customer, revenue or accounts receivable percentage |  | 10.00% | 10.00% | 10.00%
Comcast [Member] | Net Revenue [Member] | Customer Concentration Risk [Member] |  |  |  |
Entity-wide revenue, major customer, revenue or accounts receivable percentage |  | 20.00% | 23.00% | 15.00%

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