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Segment Information - Revenue Information by Category (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation Of Revenue [Line Items]
Revenue	$ 340,709	$ 138,081	$ 667,265	$ 408,846
Subscriber Solutions [Member]
Disaggregation Of Revenue [Line Items]
Revenue	133,675	46,867	270,147	152,489
Access & Aggregation Solutions [Member]
Disaggregation Of Revenue [Line Items]
Revenue	88,189	$ 91,214	278,273	$ 256,357
Optical Networking Solutions
Disaggregation Of Revenue [Line Items]
Revenue	$ 118,845		$ 118,845

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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