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Taxes - Components of Deferred Tax Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Components of Company's Deferred Tax Assets |  |
Net operating loss and tax credit carryforwards | $ 59,417 | $ 57,074
Depreciation, amortization and impairment of property and equipment | 39 | 39
Stock options | 250 | 210
Right of use asset | (1) | (26)
Lease liability | 1 | 26
Other | 114 |
Total deferred tax assets | 59,820 | 57,323
Valuation allowance for deferred tax assets | $ (59,820) | $ (57,323)

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