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Lease - Schedule of Balances Reported in the Consolidated Balance Sheets Related to Group’s Leases (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024
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Schedule of Balances Reported in the Consolidated Balance Sheets Related to Group’s Leases [Abstract] |  |
Right-of-use asset, net | $ 1,745 | $ 2,876
Current operating lease liabilities | 1,189 | 1,853
Non-current operating lease liabilities | $ 574 | $ 1,088

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- References No definition available. + Details
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Namespace Prefix: | ucl_
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Balance Type: | na
Period Type: | duration

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- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-1 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-1 + Details
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- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-1 + Details
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