Provision for Income Taxes - Schedule of reconciliation of the statutory federal rate and effective tax rate (Details) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Reconciliation of the statutory federal rate and the company's effective tax rate | |||
| U.S. federal taxes at statutory rate | 34.00% | 34.00% | 34.00% |
| State taxes, net of federal benefit | 0.00% | 0.00% | 0.00% |
| Permanent differences | (14.00%) | 2.00% | 3.00% |
| Foreign rate differential | (1.00%) | (2.00%) | (1.00%) |
| Federal and state credits, net of reserve | 1.00% | 2.00% | 2.00% |
| Impact of acquired deferred tax assets and liabilities | 0.00% | 1.00% | 1.00% |
| Change in valuation allowance | 8.00% | (32.00%) | (33.00%) |
| Change in rate | (25.00%) | 0.00% | (1.00%) |
| Deferred adjustments | (3.00%) | (5.00%) | (4.00%) |
| Effective tax rate | 0.00% | 0.00% | 1.00% |
| X | ||||||||||
- Definition Effective Income Tax Rate Reconciliation, Deferred Taxes, Percent No definition available.
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- Definition The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by federal and state credits net of reserve generated or utilized under enacted tax laws during the period. No definition available.
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the income tax rates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible expenses. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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