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Taxation (Details) - Schedule of Per Share Effect of the Tax Holidays (Parentheticals) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule of Per Share Effect of the Tax Holidays [Abstract]
Per share effect – diluted	$ 0.00	$ 0.00	$ (0.01)

X

- Definition

Income loss net of tax per diluted share.

+ References

No definition available.

+ Details

Name:	ucl_IncomeLossNetOfTaxPerDilutedShare
Namespace Prefix:	ucl_
Data Type:	dtr:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_IncomeTaxHolidayLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration