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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2023
Income Tax Disclosure [Abstract] |
Schedule of Reconciliation of Provision for Income Taxes Computed at Statutory Federal Income Tax Rate to Provision for Income Taxes | A reconciliation of the provision for income taxes computed at the statutory federal income tax rate to the provision for income taxes as reflected in the financial statements is as follows:
|  | Years Ended December 31, |
|  | 2023 |  |  | 2022 |  |  | 2021 |
Income tax computed at federal statutory rate |  |  | 21.0 | % |  |  | 21.0 | % |  |  | 21.0 | %
State taxes, net of federal benefit |  |  | 13.2 | % |  |  | 2.5 | % |  |  | 2.9 | %
General business credit carryovers |  |  | 1.5 | % |  |  | 1.0 | % |  |  | -5.0 | %
Non-deductible expenses |  |  | -1.0 | % |  |  | -0.2 | % |  |  | -0.5 | %
Change in valuation allowance |  |  | -34.9 | % |  |  | -24.1 | % |  |  | -19.2 | %
Return to provision true up |  |  | 0.0 | % |  |  | -0.2 | % |  |  | 0.0 | %
Other |  |  | 0.0 | % |  |  | 0.0 | % |  |  | 0.8 | %
|  |  | -0.2 | % |  |  | 0.0 | % |  |  | 0.0 | %
Components of Deferred Tax | The significant components of the Company’s deferred tax are as follows (in thousands):
|  | Years Ended December 31, |
|  | 2023 |  |  | 2022 |
Deferred tax assets (liabilities): |  |  |  |  |  |
Net operating loss carryforwards |  | $ | 32,664 |  |  | $ | 23,650 |
Research and development credits |  |  | 11,765 |  |  |  | 8,124 |
Capitalized start-up and other costs |  |  | 68,859 |  |  |  | 45,374 |
Capitalized research and development costs |  |  | 79,562 |  |  |  | 48,917 |
Equity based compensation |  |  | 10,276 |  |  |  | 5,004 |
Accruals |  |  | 2,795 |  |  |  | 1,985 |
Other temporary differences |  |  | 36 |  |  |  | 27 |
Deferred tax assets before valuation allowance |  |  | 205,957 |  |  |  | 133,081 |
Valuation allowances |  |  | (205,957 | ) |  |  | (133,081 | )
Net deferred tax assets |  | $ | — |  |  | $ | — |
Summary of Reconciliation of Company's Unrecognized Tax Benefits | A reconciliation of the Company’s unrecognized tax benefits is as follows (in thousands):
|  | Years Ended December 31, |
|  | 2023 |  |  | 2022 |  |  | 2021 |
Unrecognized tax benefit--beginning of year |  | $ | 143 |  |  | $ | 163 |  |  | $ | 163 |
Decreases related to prior period positions |  |  | — |  |  |  | (20 | ) |  |  | — |
Unrecognized tax benefit--end of year |  | $ | 143 |  |  | $ | 143 |  |  | $ | 163 |

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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 -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-2 + 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 -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Paragraph 12 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-12 + Details
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- Definition Tabular disclosure for tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities and other income tax contingencies. Includes, but is not limited to, interest and penalties, reconciliation of unrecognized tax benefits, unrecognized tax benefits that would affect the effective tax rate, tax years that remain subject to examination by tax jurisdictions, and information about positions for which it is reasonably possible that amounts unrecognized will significantly change within 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-15 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-15A Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 19 -SubTopic 10 -Topic 740 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-19 + Details
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