XML 91 R72.htm IDEA: XBRL DOCUMENT
v3.26.1

Taxation - Schedule of Per Share Effect of the Tax Holidays (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Taxation [Abstract] |  |  |
Effect of tax holiday | $ (549) | $ (542) | $ (448)
Per share effect – basic and diluted | $ 0 | $ 0 | $ 0

X
- Definition Income tax reconciliation tax holidays reversal. + References No definition available. + Details
Name: | ucl_IncomeTaxReconciliationTaxHolidaysReversal
Namespace Prefix: | ucl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Per share amount effect of the income tax benefit resulting from the income tax holidays granted by taxing jurisdictions. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 11.C) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479360/740-10-S99-2 + Details
Name: | us-gaap_IncomeTaxHolidayIncomeTaxBenefitsPerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration