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Revenue - Disaggregate of Revenue by Reportable Segment and Revenue Category (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation Of Revenue [Line Items]
Revenue	$ 327,378	$ 172,038	$ 651,290	$ 326,556
Optical Networking Solutions
Disaggregation Of Revenue [Line Items]
Revenue	142,996		290,752
Access & Aggregation Solutions [Member]
Disaggregation Of Revenue [Line Items]
Revenue	102,717	92,288	199,537	190,084
Subscriber Solutions
Disaggregation Of Revenue [Line Items]
Revenue	81,665	79,750	161,001	136,472
Network Solutions [Member]
Disaggregation Of Revenue [Line Items]
Revenue	283,002	155,992	565,420	294,366
Network Solutions [Member] | Optical Networking Solutions
Disaggregation Of Revenue [Line Items]
Revenue	120,221		247,798
Network Solutions [Member] | Access & Aggregation Solutions [Member]
Disaggregation Of Revenue [Line Items]
Revenue	89,263	80,821	173,817	166,805
Network Solutions [Member] | Subscriber Solutions
Disaggregation Of Revenue [Line Items]
Revenue	73,518	75,171	143,805	127,561
Services & Support [Member]
Disaggregation Of Revenue [Line Items]
Revenue	44,376	16,046	85,870	32,190
Services & Support [Member] | Optical Networking Solutions
Disaggregation Of Revenue [Line Items]
Revenue	22,775		42,954
Services & Support [Member] | Access & Aggregation Solutions [Member]
Disaggregation Of Revenue [Line Items]
Revenue	13,454	11,467	25,720	23,279
Services & Support [Member] | Subscriber Solutions
Disaggregation Of Revenue [Line Items]
Revenue	$ 8,147	$ 4,579	$ 17,196	$ 8,911

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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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