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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
Income Tax [Line Items] |  |  |  |
Net operating losses percentage | 80.00% |  |  |
Transition tax unrepatriated earnings foreign subsidiaries payable period | 8 years |  |  |
Income tax expense | $ 19,000,000 |  |  |
Favorable measurement-period adjustment to income tax expense | $ 5,200,000 |  |  |
Measurement-period adjustment reduction of rate | 3.70% |  |  |
Foreign earnings repatriated | $ 100,000,000 |  |  |
Additional income tax expense | $ 1,800,000 |  |  |
Increase in effective tax rate | 1.30% |  |  |
Corporate tax rate | 21.00% | 35.00% | 35.00% |
Deferred income tax benefit |  | $ 4,500,000 |  |
Tax cuts and jobs act of 2017 deferred income tax expense benefit | $ 9,700,000 |  |  |
Deduction percent of qualified property | 100.00% |  |  |
Depreciation phased out percentage | 20.00% |  |  |
Estimated expenditure on qualified property | $ 11,500,000 |  |  |
Addition in valuation allowance | 0 |  |  |
Income tax expense, current | $ 600,000 |  |  |
Increase in effective tax rate | 0.40% |  |  |
Increase in effective tax rate | 0.30% |  |  |
Tax loss carryforwards | $ 14,901,000 | 10,352,000 |  |
Tax credit carryforwards | 2,141,000 | 1,851,000 |  |
Valuation Allowance | 3,701,000 | 2,255,000 |  |
Unrecognized tax benefits | 168,000 | 1,927,000 | $ 1,931,000 | $ 1,958,000
Unrecognized tax benefits that, if recognized, would impact effective tax rates | 162,000 | 1,917,000 | 1,921,000 |
Recognition of interest and penalties accrued related to unrecognized tax benefits as income tax expense | 26,000 | 3,000 | $ 9,000 |
Income tax liability for interest and penalties | 30,000 | 56,000 |  |
Unrecognized tax benefits from adjustments related to examination | 1,526,000 |  |  |
Income tax refund receivable | 1,300,000 |  |  |
Executive [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Income tax expense | 500,000 |  |  |
Maximum deductible limitation for employee compensation | 1,000,000 |  |  |
Deemed Repatriation Transition Tax [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Provisional transition tax obligation | 19,000,000 | 19,400,000 |  |
Income tax expense | 19,000,000 | $ 19,400,000 |  |
Favorable measurement-period adjustment transition tax obligation | 400,000 |  |  |
Favorable measurement-period adjustment to income tax expense | $ 400,000 |  |  |
Measurement-period adjustment reduction of rate | 0.30% |  |  |
Maximum [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Foreign tax credit percent | 50.00% |  |  |

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