Cash And Cash Equivalent Maximum Maturity

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More Likely Than Not Threshold Recognition of Uncertain Tax Position

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Net Accumulated Gain or Loss as a Percentage of Projected Plan Benefit Obligation

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Number Of Customers Accounting For More Than Ten Percent of Net Accounts Receivable

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Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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Unamortized costs incurred for development of computer software, which is to be sold, leased or otherwise marketed, after establishing technological feasibility through to the general release of the software products. Excludes capitalized costs of developing software for internal use.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount of gain (loss), recognized immediately as component of net periodic benefit (cost) credit, for change in value of benefit obligation or plan assets from experience different from that assumed, change in actuarial assumption, or consequence of temporarily deviating from substantive plan. Includes, but is not limited to, amount in excess of ten percent of greater of fair value of plan assets or benefit obligation.

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- Definition

Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of investment in equity security without readily determinable fair value.

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The reporting currency-denominated expense (including losses) amount.

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Fair value as of the balance sheet date of all foreign currency derivatives not designated as hedging instruments.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount, before accumulated amortization, of capitalized implementation cost from hosting arrangement that is service contract.

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

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Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

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Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment).

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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The amount of customer funding recorded as an offset to costs incurred for a fixed-price, best-efforts research and development cost-sharing arrangement with the Federal Government.

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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%