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Contract liabilities and deferred income - Schedule of Contract liabilities and deferred income (Parenthetical) (Detail) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Contract Liabilities And Deferred Income [Line Items] |  |  |
Deferred revenue and income, non-current | [1] | $ 1,223 | $ 1,850
Contract Liabilities |  | 27,000 | 25,900
Membership subscription [Member] |  |  |
Contract Liabilities And Deferred Income [Line Items] |  |  |
Deferred revenue and income, non-current |  | 781,000 | 517,000
Government grants [Member] |  |  |
Contract Liabilities And Deferred Income [Line Items] |  |  |
Deferred revenue and income, non-current |  | $ 442 | $ 1,333,000
[1] | As of December 31, 2019, the non-current portion consists of membership subscription of USD 781,000 (2018: USD 517,000),and government grants of USD 442,000 (2018: USD 1,333,000).

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- Definition Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(5)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of Contract Liabilities. + References No definition available. + Details
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Namespace Prefix: | xnet_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- 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
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Namespace Prefix: | xnet_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |