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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2020
Income Tax Disclosure [Abstract] |
Schedule of Effective Income Tax Rate Reconciliation | A reconciliation of income tax expense computed at the statutory federal income tax rate to income taxes reflected in the consolidated financial statements is as follows:
|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |
Income tax computed at federal statutory tax rate |  |  | 21.0 | % |  |  | 21.0 | %
Permanent differences |  |  | (2.0 | )% |  |  | (0.2 | )%
State taxes, net of federal benefit |  |  | 5.4 | % |  |  | 6.2 | %
Research and development and other tax credits |  |  | 2.6 | % |  |  | 3.8 | %
Change in deferred tax asset valuation allowance |  |  | (28.4 | )% |  |  | (30.7 | )%
Other |  |  | 1.4 | % |  |  | (0.1 | )%
|  |  | — | % |  |  | — | %
Schedule of Deferred Tax Assets and Liabilities | Net deferred tax assets as of December 31, 2020 and 2019 consist of the following (in thousands):
| December 31, |
| 2020 |  |  | 2019 |
Deferred tax assets: |  |  |  |  |  |  |
Net operating loss carryforwards | $ | 35,729 |  |  | $ | 30,006 |
Research and development credits |  | 5,223 |  |  |  | 4,652 |
Stock-based compensation |  | 322 |  |  |  | 173 |
Operating lease liabilities |  | 661 |  |  |  | 909 |
Other |  | 140 |  |  |  | 280 |
Total gross deferred tax assets |  | 42,075 |  |  |  | 36,020 |
Less: Valuation allowance |  | (41,451 | ) |  |  | (35,150 | )
Total deferred tax assets |  | 624 |  |  |  | 870 |
Deferred tax liabilities: |  |  |  |  |  |  |
Operating lease right-of-use assets |  | (624 | ) |  |  | (870 | )
Total deferred tax liabilities |  | (624 | ) |  |  | (870 | )
Net deferred taxes | $ | — |  |  | $ | — |

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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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