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Summary of significant accounting policies - Intangible assets (Details)	12 Months Ended
	Dec. 31, 2020
Land use right [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives	30 years
Acquired computer software [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives	5 years
Audio visual licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives	9 years
Minimum | Online game licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives	1 year
Maximum | Online game licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives	3 years

X

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
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_FiniteLivedIntangibleAssetsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=xnet_AcquiredComputerSoftwareMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=xnet_AudioVisualLicensesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=xnet_OnlineGameLicensesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: