Income Taxes - Deferred Taxes (Details) - USD ($) $ in Thousands |
Dec. 31, 2020 |
Dec. 31, 2019 |
|---|---|---|
| Deferred tax assets: | ||
| NOLs | $ 25,949 | $ 22,033 |
| Research and development credits | 14,920 | 14,138 |
| Research and development expenses capitalized for tax purposes | 93,812 | 92,350 |
| Equity-based compensation | 4,130 | 4,586 |
| Deferred rent | 772 | 847 |
| Depreciation | 246 | 162 |
| Other temporary differences | 730 | 538 |
| Total deferred tax assets | 140,559 | 134,654 |
| Deferred tax liabilities: | ||
| Prepaid expenses | (119) | (86) |
| Total deferred tax liabilities | (119) | (86) |
| Net deferred tax assets | 140,440 | 134,568 |
| Less valuation allowance | (140,440) | (134,568) |
| Net deferred tax asset | $ 0 | $ 0 |
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- Definition Represents the amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences. No definition available.
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- Definition Represents the amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from research and development expenses capitalized for tax purposes. No definition available.
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- Definition Amount of deferred tax liability attributable to taxable temporary differences. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from property, plant, and equipment. No definition available.
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible research tax credit carryforwards. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from deferred rent. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Amount of deferred tax consequences attributable to taxable temporary differences derived from prepaid expenses. No definition available.
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