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Income Taxes - Components of Net Deferred Tax Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Deferred tax assets: |  |
Net operating losses | $ 13,108 | $ 12,918
Intangibles | 69 | 75
Tax credit carryforwards | 3,674 | 1,648
Derivative | 1,455 | 1,577
Stock based compensation | 2,645 | 1,003
Reserves and accruals | 1,105 | 804
Capitalized research expenditures | 20,059 |
License fees | 14,235 | 7,716
Operating lease liability | 5,107 | 45
Other | 29 | 25
Total deferred tax assets before valuation allowance | 61,486 | 25,811
Less: valuation allowance | (57,812) | (25,748)
Total deferred tax assets | 3,674 | 63
Deferred tax liabilities: |  |
Operating lease ROU assets | $ (3,674) | $ (63)

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