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v3.24.1

Income Taxes - Deferred tax assets (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022
Deferred tax assets: |  |
Federal and state net operating loss carryforwards | $ 56,409,000 | $ 49,789,000
Research and development tax credits | 14,208,000 | 11,395,000
Capitalized R&D Costs | 20,776,000 | 12,424,000
Operating lease liabilities | 1,818,000 | 1,960,000
Share-based compensation | 6,053,000 | 4,389,000
Accruals and other | 1,076,000 | 1,305,000
Gross deferred tax assets | 100,340,000 | 81,262,000
Less: valuation allowance | (98,960,000) | (79,724,000)
Total deferred tax assets | 1,380,000 | 1,538,000
Deferred tax liabilities: |  |
Operating lease assets | (1,380,000) | (1,538,000)
Gross deferred tax liabilities | (1,380,000) | $ (1,538,000)
Increase in valuation allowance | 19,200,000 |
Federal net operating loss carryforwards | 203,900,000 |
State net operating loss carryforwards | 208,500,000 |
Federal net operating loss carryforwards that do not expire | 181,100,000 |
Federal research and development tax credit carryforwards | 14,100,000 |
State research and development tax credit carryforwards | 100,000 |
Unrecognized income tax benefits | $ 0 |

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