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Stock-Based Compensation (Stock Options) - Additional Information (Detail) - USD ($) |  | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Oct. 25, 2023 | Dec. 31, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Jul. 22, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |
Options available for issuance under shareholders-approved equity plan |  |  | 1,100,000 |  |  |
Aggregate intrinsic value based on fair market value |  | $ 16,251,000 | $ 3,087,000 | $ 16,251,000 |  |
Total pre-tax intrinsic value of options exercised |  |  | 100,000 | 4,000,000 | $ 1,500,000 |
Fair value of options fully vested |  |  | $ 1,100,000 | $ 200,000 | $ 0 |
Weighted-average estimated fair value per share of stock options granted to employees |  |  | $ 2.99 | $ 5.81 |  |
Number of Stock options, granted |  |  | 1,330,000 |  | 0 |
Business Efficiency Program [Member] |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |
Employee stock option awards for retention purposes | 1,300,000 |  |  |  |  |
Chief Executive Officer [Member] | Business Efficiency Program [Member] |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |
Voluntarily reduction in salary | 50.00% |  |  |  |  |
Maximum [Member] |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |
Options available for issuance under shareholders-approved equity plan |  |  | 2,300,000 |  |  |
Adtran Networks [Member] |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |
Unrecognized compensation expense related to stock options |  |  | $ 24,000 |  |  |
Recognition period of unvested compensation expense |  |  | 1 year 4 months 24 days |  |  |
Options available for issuance under shareholders-approved equity plan |  |  |  |  |  | 2,100,000
Aggregate intrinsic value based on fair market value |  | 1,222,000 | $ 193,000 | $ 1,222,000 |  |
Total pre-tax intrinsic value of options exercised |  |  | $ 700,000 |  |  |
Fair value of options fully vested |  | $ 1,600,000 |  |  |  |

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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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- Definition Line items represent financial concepts included in a table. 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- Definition Gross number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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