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Income Taxes - Additional disclosures (Details) - USD ($) | 12 Months Ended
--- | ---
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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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 231 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482663/740-10-55-231 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12A -Subparagraph (a)(6) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12A Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12 + Details
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