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Description of Business and Summary of Significant Accounting Policies - Income Taxes (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Tax Credit Carryforward [Line Items] |  |
Deferred tax assets | $ 3,766 | $ 3,819
Australia and Portugal |  |
Tax Credit Carryforward [Line Items] |  |
Deferred tax assets | $ 3,800 |
U.K. and Australia |  |
Tax Credit Carryforward [Line Items] |  |
Deferred tax assets |  | $ 3,800

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- Definition Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-2 + Details
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