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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2023
Income Tax Disclosure [Abstract] |
Schedule of Loss Before Income Taxes | For financial reporting purposes, loss before income taxes includes the following components (in thousands):
|  | Year Ended December 31, |
|  | 2023 |  |  | 2022 |  |  | 2021 |
Domestic |  | $ | (106,833 | ) |  | $ | (113,558 | ) |  | $ | (65,415 | )
Foreign |  |  | (1,380 | ) |  |  | 283 |  |  |  | 203 |
Loss before income taxes |  | $ | (108,213 | ) |  | $ | (113,275 | ) |  | $ | (65,212 | )
Schedule of Provision for Income Taxes | The provision for income taxes consists of the following (in thousands):
|  | Year Ended December 31, |
|  | 2023 |  |  | 2022 |  |  | 2021 |
Current: |  |  |  |  |  |  |  |  |
Federal |  | $ | (9 | ) |  | $ | — |  |  | $ | — |
State |  |  | 3 |  |  |  | 5 |  |  |  | — |
Foreign |  |  | 35 |  |  |  | 66 |  |  |  | 43 |
Total current |  |  | 29 |  |  |  | 71 |  |  |  | 43 |
Deferred: |  |  |  |  |  |  |  |  |
Foreign |  |  | 54 |  |  |  | (31 | ) |  |  | (29 | )
Total deferred |  |  | 54 |  |  |  | (31 | ) |  |  | (29 | )
Provision for income taxes |  | $ | 83 |  |  | $ | 40 |  |  | $ | 14 |
Summary of Income Tax Provision Related to Continuing Operations Statutory Income Tax Rate | Income tax provision related to continuing operations differ from the amounts computed by applying the statutory income tax rate of 21% to pretax loss as follows:
|  | Year Ended December 31,
|  | 2023 |  | 2022 |  | 2021
Expected tax (benefit) at federal statutory rate |  | (21%) |  | (21%) |  | (21%)
Effect of: |  |  |  |  |  |
State taxes |  | (7%) |  | (6%) |  | (9%)
Change in valuation allowance |  | 26% |  | 28% |  | 36%
Stock-based compensation |  | 3% |  | 1% |  | (3%)
Research and development credit |  | (3%) |  | (2%) |  | (3%)
Other |  | 2% |  | –% |  | –%
Effective tax rate |  | –% |  | –% |  | –%
Components of Deferred Tax Assets for Federal and State Income Taxes | Significant components of the Company’s deferred tax assets for federal and state income taxes are as follows (in thousands):
|  | December 31, |
|  | 2023 |  |  | 2022 |
Deferred tax assets: |  |  |  |  |  |
Net operating loss carryforwards |  | $ | 83,983 |  |  | $ | 72,408 |
Research and development credits |  |  | 22,669 |  |  |  | 16,824 |
Capitalized research and development |  |  | 22,089 |  |  |  | 11,972 |
Deferred revenue |  |  | 362 |  |  |  | 38 |
Accruals and reserves |  |  | 2,883 |  |  |  | 1,914 |
Stock-based compensation |  |  | 4,614 |  |  |  | 5,197 |
Operating lease liabilities |  |  | 13,124 |  |  |  | 13,455 |
Other intangibles |  |  | 209 |  |  |  | 267 |
Other |  |  | 132 |  |  |  | 236 |
Total gross deferred tax assets |  |  | 150,065 |  |  |  | 122,311 |
Less: valuation allowance |  |  | (144,861 | ) |  |  | (114,483 | )
Total deferred tax assets |  |  | 5,204 |  |  |  | 7,828 |
Deferred tax liabilities: |  |  |  |  |  |
Property and equipment |  |  | (113 | ) |  |  | (108 | )
Operating lease right-of-use assets |  |  | (5,084 | ) |  |  | (7,659 | )
Total deferred tax liabilities |  |  | (5,197 | ) |  |  | (7,767 | )
Net deferred tax assets |  | $ | 7 |  |  | $ | 61 |
Summary of Unrecognized Tax Benefits | The Company has the following activity relating to unrecognized tax benefits (in thousands):
|  | December 31, |
|  | 2023 |  |  | 2022 |
Beginning balance |  | $ | 4,240 |  |  | $ | 3,066 |
Gross increase—tax position in prior periods |  |  | 162 |  |  |  | - |
Gross increase—tax position in current period |  |  | 1,299 |  |  |  | 1,174 |
Ending balance |  | $ | 5,701 |  |  | $ | 4,240 |

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