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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Nov. 12, 2019 | Mar. 29, 2019 | Dec. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
U.S. Statutory Federal Tax Rate |  |  |  | 21.00% | 21.00% | 35.00% |  |
World Consolidated Loss Before Tax |  |  |  | $ 6,596 | $ 16,948 | $ 84,707 | [1] |
Income Tax Expense (Benefit) |  |  |  | $ (672) | $ 4,087 | $ (1,752) |  |
Effective Income Tax Rate Reconciliation, Percent |  |  |  | 10.00% | (24.00%) | 2.00% |  |
One-time benefit due to changes in Company's global tax structure |  |  | $ 2,000 | $ 2,000 |  |  |  |
Benefit from a Valuation Allowance Release |  |  |  | 923 | $ (1,449) | $ 2,834 |  |
Valuation Allowance Deferred Tax Asset Addition |  |  |  | 23,929 | 928 | 9,028 |  |
Valuation Allowance Deferred Tax Asset Deductions |  |  |  | 5,555 | 1,540 | 5,752 |  |
Deferred Tax Assets, Valuation Allowance |  |  | $ 77,144 | 95,518 | $ 77,144 | 77,756 |  | $ 74,480
Number of Days to Petition the U.S. Supreme Court | 90 days |  |  |  |  |  |  |
Cumulative Undistributed Earnings of non-U.S. subsidiaries intended to be indefinitely reinvested |  |  |  | $ 20,500 |  |  |  |
More Likely Than Not Threshold Recognition of Uncertain Tax Position |  |  |  | 50.00% |  |  |  |
Gross unrecognized tax benefits including interest and penalties |  |  |  | $ 15,700 |  |  |  |
US Tax Cuts Jobs Act [Member] | AMT credit carryover [Member] |  |  |  |  |  |  |  |
Benefit from a Valuation Allowance Release |  |  |  |  |  | $ 2,600 |  |
Foreign [Member] |  |  |  |  |  |  |  |
Benefit from a Valuation Allowance Release |  | $ 800 |  | 800 |  |  |  |
Operating Loss Carryforwards |  |  |  | 159,800 |  |  |  |
Federal [Member] |  |  |  |  |  |  |  |
Operating Loss Carryforwards |  |  |  | 31,200 |  |  |  |
Tax credit carryovers |  |  |  | $ 13,700 |  |  |  |
Year that federal tax credits expire |  |  |  | Jan. 01, 2031 |  |  |  |
California Franchise Tax Board [Member] |  |  |  |  |  |  |  |
Operating Loss Carryforwards |  |  |  | $ 27,000 |  |  |  |
Tax credit carryovers |  |  |  | $ 35,700 |  |  |  |
Tax credit expiration |  |  |  | will not expire |  |  |  |
State [Member] |  |  |  |  |  |  |  |
Operating Loss Carryforwards |  |  |  | $ 55,300 |  |  |  |
Israel Tax Authority [Member] |  |  |  |  |  |  |  |
Valuation Allowance Deferred Tax Asset Deductions |  |  |  | $ 5,600 |  |  |  |
Minimum [Member] | Federal [Member] |  |  |  |  |  |  |  |
Operating loss carryforwards, expiration date |  |  |  | Jan. 01, 2026 |  |  |  |
Minimum [Member] | California Franchise Tax Board [Member] |  |  |  |  |  |  |  |
Operating loss carryforwards, expiration date |  |  |  | Jan. 01, 2026 |  |  |  |
Maximum [Member] | Federal [Member] |  |  |  |  |  |  |  |
Operating loss carryforwards, expiration date |  |  |  | Jan. 01, 2039 |  |  |  |
Maximum [Member] | California Franchise Tax Board [Member] |  |  |  |  |  |  |  |
Operating loss carryforwards, expiration date |  |  |  | Jan. 01, 2039 |  |  |  |
[1] | For the year ended December 31, 2017, the unallocated corporate expenses included acquisition- and integration-related costs, French VDP costs (see Note 11, “Restructuring and Related charges,” for more information on French VDP) and Cable Access product line inventory obsolescence costs, totaling $7.9 million. In addition, in fiscal 2017, the unallocated corporate expenses included $8.0 million of Avid litigation settlement cost and associated legal fees (see Note 20, “Legal Proceedings,” for more information). The remaining unallocated corporate expenses for all years presented above include primarily other restructuring charges and excess facilities charges.

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