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Income Taxes - Additional disclosures (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Income Taxes |  |
Deferred tax assets, valuation allowance | $ 720,000 | $ 405,000
Tax credit carryforwards | 10,800,000 |
Provision for income tax | 0 | 0
Unrecognized tax benefits | 0 | 0
Accrued interest or penalties | 0 | 0
Federal |  |
Income Taxes |  |
Net operating loss carryforwards | $ 195,000,000 | 177,000,000
Income tax credit expiration description | Federal credits begin to expire in 2040 and will continue to expire through 2041. State credits begin to expire in 2023 and continue through 2034 |
State |  |
Income Taxes |  |
Net operating loss carryforwards | $ 196,000,000 | $ 178,000,000
Income tax credit expiration description | begin to expire in 2040 and will continue to expire through 2042 |

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