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Note 10 - Income Taxes (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% | 21.00% | 21.00%
Deferred Tax Assets, Valuation Allowance | $ 28,767 | $ 17,554 |
Operating Loss Carryforwards | 230,100 |  |
Deferred Tax Assets, Interest Expenses, Carryforward | 18,900 |  |
Unrecognized Tax Benefits | 0 | 0 |
Income Tax Examination, Penalties and Interest Accrued | 800 |  |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued |  | $ 0 |
Foreign Tax Authority [Member] |  |  |
Tax Credit Carryforward, Amount | $ 13,000 |  |

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-2 + Details
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