Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) |
Dec. 31, 2020 |
Dec. 31, 2019 |
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| Deferred tax assets: | ||
| Net operating loss carryovers | $ 65,989,759 | $ 56,646,542 |
| Share-based compensation | 2,265,006 | 1,770,295 |
| R&D tax credits | 3,833,265 | 3,149,249 |
| Accrued compensation and severance | 587,183 | 454,128 |
| Lease liability | 1,012,743 | 1,101,248 |
| Intangible assets | 98,915 | 110,178 |
| Total deferred tax assets | 73,786,871 | 63,231,640 |
| Valuation allowance | (72,803,194) | (62,136,614) |
| Total deferred tax assets net of valuation allowance | 983,677 | 1,095,026 |
| Deferred tax liabilities: | ||
| Right-of-use asset | (832,477) | (909,271) |
| Depreciation | (151,200) | (185,755) |
| Total deferred tax liabilities | (983,677) | (1,095,026) |
| Net deferred tax asset (liability) | $ 0 | $ 0 |
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- Definition Deferred tax assets operating lease liability. . No definition available.
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- Definition Deferred Tax Liabilities Depreciation No definition available.
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- Definition Deferred tax liabilities operating lease right of use asset. No definition available.
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- References 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 from intangible assets including goodwill. No definition available.
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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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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. 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 operating loss 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 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 severance costs. 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 share-based compensation. 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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