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Income Taxes - Additional Information (Detail) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income Taxes [Line Items] |  |  |  |
Net tax benefit | $ 5,900,000 | $ 800,000 | $ 51,800,000 |
Federal corporate income tax rate | 21.00% | 21.00% | 35.00% |
Effective tax rate on non deductible expense | 6.30% | 5.10% | 132.10% |
Deferred tax asset valuation allowance change in amount net | $ 10,800,000 | $ 6,900,000 | $ 3,500,000 |
Valuation allowance on deferred tax assets | (19,033,000) | (14,460,000) | (7,608,000) |
Unrecognized tax benefits | 2,589,000 | 4,609,000 | 5,655,000 | $ 4,741,000
Amount of unrecognized tax benefits would, if recognized, impact effective tax rate | 3,600,000 |  |  |
Decrease in unrecognized income benefits and interest | 1,400,000 |  |  |
Operating loss carryforward, valuation allowance | 1,000,000 |  |  |
Tax credit carryforward, valuation allowance | 3,300,000 |  |  |
Impact of these tax holidays decreased foreign taxes | 0.00 | 0.00 | $ 800,000 |
Benefit of the tax holidays on net income per share (diluted) |  |  | $ 0.03 |
Deferred tax assets, tax credit carryforwards, research | 2,654,000 | 917,000 |  |
Non-U.S. credit carryforwards | 3,313,000 | 4,130,000 |  |
Deferred tax liability. repatriation of the unremitted earnings | 2,300,000 |  |  |
Income tax examination, penalties and interest accured | 1,500,000 | $ 1,300,000 | $ 1,400,000 |
State Net Operating Loss Carryforwards |  |  |  |
Income Taxes [Line Items] |  |  |  |
Deferred tax asset valuation allowance amount increase |  |  | 2,300,000 |
Foreign Net Operating Loss Carryforwards |  |  |  |
Income Taxes [Line Items] |  |  |  |
Deferred tax asset valuation allowance amount increase |  |  | $ 1,200,000 |
Foreign Tax Authority |  |  |  |
Income Taxes [Line Items] |  |  |  |
Deferred tax asset valuation allowance change in amount net | 900,000 |  |  |
NOL carryovers | $ 14,100,000 |  |  |
NOL carryovers expiration beginning year | 46023 |  |  |
Tax credits in foreign jurisdictions | $ 3,400,000 |  |  |
United States |  |  |  |
Income Taxes [Line Items] |  |  |  |
Deferred tax asset valuation allowance change in amount net | 1,500,000 |  |  |
Valuation allowance on deferred tax assets | (500,000) |  |  |
NOL carryovers | 1,500,000 |  |  |
Tax credits in foreign jurisdictions | 5,800,000 |  |  |
Deferred tax assets, tax credit carryforwards, research | 2,400,000 |  |  |
State and Local Jurisdiction |  |  |  |
Income Taxes [Line Items] |  |  |  |
Deferred tax asset valuation allowance change in amount net | 5,200,000 |  |  |
NOL carryovers | $ 225,400,000 |  |  |
NOL carryovers expiration beginning year | 47484 |  |  |
Tax credits in foreign jurisdictions | $ 200,000 |  |  |

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