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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Deferred tax assets: |  |
Net operating loss carryforwards | $ 19,830 | $ 18,437
Stock-based compensation | 742 | 576
Intangible Assets | 2,923 | 3,848
Foreign net operating loss carryforwards | 47,179 | 34,819
Unrealized gain or loss | 1,686 | 1,130
Other, net | 693 | 9
Total deferred tax assets | 73,053 | 58,819
Deferred tax liabilities: |  |
Property, plant and equipment | 0 | (2)
Total deferred tax liability | 0 | (2)
Net deferred tax assets | 73,053 | 58,817
Less valuation allowance | (73,053) | (58,817)
Net deferred tax assets, valuation allowance total | $ 0 | $ 0

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