Income Taxes - Additional Information (Detail) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
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| Income Tax Contingency [Line Items] | ||
| Unused operating loss carryforwards for federal tax purposes | $ 234,261,000 | |
| Unused operating loss carryforwards for state tax purposes | $ 252,259,000 | |
| Net operating loss carryforwards, expiration year | 2028 | |
| Deferred tax valuation allowance | $ 72,803,194 | $ 62,136,614 |
| Increase (decrease) in valuation allowance | 10,666,000 | $ 7,984,000 |
| Unrecognized tax benefits | 0 | |
| Unrecognized interest | 0 | |
| Unrecognized penalties accrued | $ 0 | |
| Research and development credit carry forwards expiration year | 2031 | |
| X | ||||||||||
- Definition Net operating loss carryforward expiration year. No definition available.
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- Definition Research And Development Credit Carry Forwards Expiration Year. No definition available.
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local 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 state and local operating loss carryforwards. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of statutory penalties accrued for a tax position claimed or expected to be claimed by the entity, in its tax return. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of interest expense accrued for an underpayment of income taxes. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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