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v3.23.2

Stock-Based Compensation (PSUs, RSUs and Restricted Stock) - Additional Information (Detail) - USD ($) $ in Millions |  | 9 Months Ended |
--- | --- | --- | ---
Jul. 15, 2022 | Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2020 | Jul. 22, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Share granted |  | 545,000 |  |  |
Recognition period of unvested compensation expense |  | 2 years 8 months 12 days |  |  |
Options available for issuance under stockholders-approved equity plan |  | 3,400,000 |  |  |
ADVA Optical Networking SE, [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Recognition period of unvested compensation expense |  | 1 year 1 month 6 days |  |  |
Number of market based PSU awards converted to time based RSU awards | 300,000 |  |  |  |
Options available for issuance under stockholders-approved equity plan |  |  |  |  | 2,000,000
Maximum [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Options available for issuance under stockholders-approved equity plan |  | 2,100,000 |  |  |
Performance Stock Units (PSUs) [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Share granted |  | 300,000 | 300,000 |  |
Vesting period |  | 1 year | 2 years | 3 years |
Performance Stock Units (PSUs) [Member] | Minimum [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Percentage of performance stock units granted |  | 0.00% | 0.00% | 0.00% |
Performance Stock Units (PSUs) [Member] | Maximum [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Percentage of performance stock units granted |  | 142.80% | 142.80% | 142.80% |
Market-Based PSUs, RSUs and Restricted Stock [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Unrecognized compensation expense related to other than options |  | $ 24.6 |  |  |
Recognition period of unvested compensation expense |  | 1 year 7 months 6 days |  |  |
Time-Based RSUs [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Unrecognized compensation expense related to other than options | $ 17.8 | $ 8.9 |  |  |
Recognition period of unvested compensation expense | 3 months 18 days |  |  |  |
Time-Based RSUs [Member] | ADVA Optical Networking SE, [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Unrecognized compensation expense related to other than options |  | $ 2.1 |  |  |
Recognition period of unvested compensation expense |  | 1 year 1 month 6 days |  |  |

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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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