Income Taxes - Schedule of Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands |
Dec. 31, 2020 |
Dec. 31, 2019 |
|---|---|---|
| Income Tax Disclosure [Abstract] | ||
| Deferred tax assets : Net operating loss carryforwards | $ 50,005 | $ 48,104 |
| Deferred tax assets : Stock-based compensation | 2,929 | 2,918 |
| Deferred tax assets : Federal R&D credit | 2,222 | 2,222 |
| Deferred tax assets : Accrued expenses | 135 | 112 |
| Deferred tax assets : Depreciation | 27 | |
| Deferred tax assets : Intangibles | 103 | 1 |
| Total deferred tax assets | 55,394 | 53,384 |
| Deferred tax liabilities : Depreciation | (29) | |
| Deferred tax liabilities : Right of Use Asset/Liabilities | (11) | |
| Total deferred tax liabilities | (40) | |
| Less valuation allowance | (55,354) | (53,384) |
| Net deferred tax liability |
| X | ||||||||||
- Definition Deferred tax assets depreciation. No definition available.
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| X | ||||||||||
- Definition Deferred tax liabilities Depreciation. No definition available.
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| X | ||||||||||
- Definition Deferred tax liabilities : Right of Use Asset Liabilities. No definition available.
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| X | ||||||||||
- 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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| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from intangible assets including goodwill. No definition available.
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| X | ||||||||||
- 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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| X | ||||||||||
- 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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| X | ||||||||||
- 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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| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from compensation and benefits costs. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from accrued liabilities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- 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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| X | ||||||||||
- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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