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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2017
Income Tax Disclosure [Abstract] |
Schedule of Income before Income Tax, Domestic and Foreign |
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
Domestic | $ | (2,965 | ) |  | $ | (3,106 | ) |  | $ | (7,820 | )
Foreign | 46,391 |  |  | 67,183 |  |  | 55,613 |
Income before income taxes | $ | 43,426 |  |  | $ | 64,077 |  |  | $ | 47,793 |
Schedule of Components of Income Tax Expense (Benefit) |
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
Current: |  |  |  |  |
Federal | $ | 20,277 |  |  | $ | 7,151 |  |  | $ | 12 |
State | 2 |  |  | (81 | ) |  | 100 |
Foreign | 1,216 |  |  | 1,648 |  |  | 456 |
Total current taxes | 21,495 |  |  | 8,718 |  |  | 568 |
Deferred taxes | (1,647 | ) |  | 273 |  |  | (16 | )
Income tax provision | $ | 19,848 |  |  | $ | 8,991 |  |  | $ | 552 |
Schedule of Effective Income Tax Rate Reconciliation |
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
Income tax at federal statutory rate | $ | 15,200 |  |  | $ | 22,427 |  |  | $ | 16,250 |
Effect of permanent differences | 459 |  |  | 12,496 |  |  | 370 |
Tax Cut & Jobs Act repatriation tax | 20,792 |  |  | — |  |  | — |
Tax Cut & Jobs Act federal rate change | 954 |  |  | — |  |  | — |
Change in valuation allowance | (43 | ) |  | (3,877 | ) |  | 2,017 |
Foreign rate differential | (15,002 | ) |  | (21,713 | ) |  | (18,099 | )
Foreign tax credits | (2,105 | ) |  | (261 | ) |  | — |
Other reconciling items | (407 | ) |  | (81 | ) |  | 14 |
Income tax provision | $ | 19,848 |  |  | $ | 8,991 |  |  | $ | 552 |
Income Tax Foreign Rate Differential [Table Text Block] |
|  |  | Year Ended December 31,
| Statutory Tax Rate |  | 2017 |  | 2016 |  | 2015
Cayman Islands | — | % |  | $ | 39,954 |  |  | $ | 58,169 |  |  | $ | 50,993 |
Hong Kong | 16.5 | % |  | 3,315 |  |  | 3,992 |  |  | 2,645 |
China | 25.0 | % |  | 2,584 |  |  | 3,855 |  |  | 1,493 |
Schedule of Deferred Tax Assets and Liabilities |
| December 31,
| 2017 |  | 2016
Deferred tax assets: |  |  |
Net operating losses | $ | 192 |  |  | $ | 235 |
Stock-based compensation | 270 |  |  | 623 |
Accrued expenses | 1,374 |  |  | 3,174 |
Tax credits | — |  |  | — |
Other | 6 |  |  | — |
Total deferred tax assets | 1,842 |  |  | 4,032 |
Valuation allowance | (192 | ) |  | (235 | )
Net deferred tax assets | 1,650 |  |  | 3,797 |
Deferred tax liabilities: |  |  |
Foreign earnings | (4 | ) |  | (3,650 | )
Other | (267 | ) |  | (415 | )
Total deferred tax liabilities | (271 | ) |  | (4,065 | )
Net deferred tax asset (liability) | $ | 1,379 |  |  | $ | (268 | )

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32639-109319 + Details
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