Income Taxes - Additional Information (Detail) - USD ($) |
12 Months Ended | ||
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Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
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| Income Taxes Disclosure [Line Items] | |||
| Income tax provision | $ 0 | $ 0 | |
| Increase in valuation allowance | 12,800,000 | ||
| Unrecognized benefits | 0 | 0 | $ 1,143,000 |
| Accrued interest or penalties | 0 | $ 0 | |
| State | |||
| Income Taxes Disclosure [Line Items] | |||
| Research and development credits | $ 800,000 | ||
| Year research and development credits begin to expire | 2033 | ||
| Federal | |||
| Income Taxes Disclosure [Line Items] | |||
| Net operating loss carryforwards | $ 125,500,000 | ||
| Year net operating loss carryforwards begin to expire | 2024 | ||
| Tax loss carryforwards expiration year | 2037 | ||
| Research and development credits | $ 3,500,000 | ||
| Year research and development credits begin to expire | 2022 | ||
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- Definition Income taxes disclosure. No definition available.
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- Definition Operating loss carryforward expiration start year. No definition available.
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- Definition Research and development tax credits expiration start year. No definition available.
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- Definition Tax loss carryforwards expiration year. No definition available.
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- Definition The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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 increase (decrease) in the valuation allowance for a specified deferred tax asset. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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