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Income Taxes - Deferred Tax Asset / Liability (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Deferred tax assets: |  |
Net operating loss carryforwards | $ 8,612 | $ 8,055
Capitalized research expense | 1,782 | 823
Share based compensation | 1,011 | 602
Research and development credits | 596 | 636
Lease liability | 43 | 30
Gross deferred tax assets | 12,044 | 10,146
Less valuation allowance | (12,005) | (10,116)
Total deferred tax assets | 39 | 30
Deferred tax liabilities: |  |
Right of use assets | (39) | (30)
Total deferred tax liabilities | (39) | (30)
Total deferred tax assets | $ 0 | $ 0

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