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Income Taxes - Additional Information (Detail) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Income Tax [Line Items] |  |  |  |  |
Transition tax unrepatriated earnings foreign subsidiaries payable period |  | 8 years |  |  |
Net operating losses percentage |  | 80.00% |  |  |
Corporate tax rate |  | 35.00% | 35.00% | 35.00% |
Deferred tax assets |  | $ 31,800,000 |  |  |
Deferred tax liabilities |  | 36,300,000 |  |  |
Deferred income tax benefit |  | 4,500,000 |  |  |
Provisional transition tax obligation |  | 19,400,000 |  |  |
Deferred tax liabilities noncurrent tax payable |  | 18,100,000 |  |  |
Deferred tax liabilities current tax payable |  | 1,300,000 |  |  |
Change in valuation allowance |  | 0 |  |  |
Income tax expense |  | 19,400,000 |  |  |
Tax loss carryforwards |  | 10,352,000 | $ 4,655,000 |  |
Tax credit carryforwards |  | 1,851,000 | 1,599,000 |  |
Valuation Allowance |  | 2,255,000 | 1,815,000 |  |
Unrecognized tax benefits |  | 1,927,000 | 1,931,000 | $ 1,958,000 | $ 464,000
Unrecognized tax benefits that, if recognized, would impact effective tax rates |  | 1,917,000 | 1,921,000 | 1,948,000 |
Recognition of interest and penalties accrued related to unrecognized tax benefits as income tax expense |  | 3,000 | 9,000 | $ 6,000 |
Income tax liability for interest and penalties |  | 56,000 | $ 53,000 |  |
Income tax return adjustments |  | 0 |  |  |
Executive [Member] |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |
Maximum deductible limitation for employee compensation |  | $ 1,000,000 |  |  |
Scenario Forecast [Member] |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |
Corporate tax rate | 21.00% |  |  |  |
Maximum [Member] |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |
Foreign tax credit percent |  | 50.00% |  |  |
Unrecognized tax benefits related to its current uncertain tax positions |  | $ 1,780,000 |  |  |

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