Income Taxes - Effective Tax Rate Reconciliation (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
Effective Income Tax Rate Reconciliation, Amount [Abstract] | |||
Tax (benefit) at statutory federal rate | $ (30,352) | $ (24,982) | $ (21,392) |
State Tax (benefit) — net of federal benefit | 0 | 0 | 79 |
Nondeductible/nontaxable items | 832 | 224 | 660 |
Debt discount | 0 | 0 | 756 |
Research and development credits | (544) | (516) | 3,137 |
Other | 11 | 607 | 537 |
Change in valuation allowance | 30,053 | 24,667 | 16,226 |
Provision for taxes | $ 0 | $ 0 | $ 3 |
X | ||||||||||
- Definition Effective Income Tax Reconciliation, Nondeductible and Nontaxable Items No definition available.
|
X | ||||||||||
- Definition Amount of current tax expense (benefit) and deferred tax expense (benefit) pertaining to income (loss) from continuing operations and income (loss) from discontinued operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- References No definition available.
|
X | ||||||||||
- Definition Amount 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 increase (decrease) in the valuation allowance for deferred tax assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Definition The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Definition Amount 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 amortization. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Definition Amount 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
|
X | ||||||||||
- Definition Amount 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 state and local income tax expense (benefit). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Definition Amount 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 research tax credit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|