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Income Taxes - Unrecognized tax benefits (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Income Taxes |  |
Balance at January 1 | $ 1,680 | $ 1,753
Decrease for prior year tax positions | (68) | (290)
Increase for current year tax positions | 247 | 311
Interest accrual | 97 | 67
Foreign currency remeasurement | (14) | (161)
Balance at December 31 | $ 1,942 | $ 1,680

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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-15A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 10B -Publisher FASB -URI https://asc.fasb.org//1943274/2147482525/740-10-45-10B + Details
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