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Organization and nature of operations - Accompanying Consolidated Financial Statements Include Financial Statements of Company, Subsidiaries, Variable Interest Entity ("VIE") and VIE's Subsidiaries (Detail) | 12 Months Ended
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Dec. 31, 2017
Variable Interest Entity [Line Items] |  |
Date of incorporation | Feb. 03, 2005 |
Shenzhen Xunlei Networking Technologies, Co., Ltd [Member] |  |
Variable Interest Entity [Line Items] |  |
Place of incorporation | People’s Republic of China |
Date of incorporation | Jan. 31, 2003 |
Relationship | VIE |
Percentage of direct or indirect economic ownership | 100.00% |
Principal activities | Development of software, provision of online and related advertising, membership subscription and online game services; as well as sales of software licenses |
Giganology (Shenzhen) Co. Ltd [Member] |  |
Variable Interest Entity [Line Items] |  |
Place of incorporation | PRC |
Date of incorporation | Jun. 30, 2005 |
Relationship | Subsidiary |
Percentage of direct or indirect economic ownership | 100.00% |
Principal activities | Development of computer software and provision of information technology services to related companies |
Shenzhen Xunlei Wangwenhua Co Ltd [Member] |  |
Variable Interest Entity [Line Items] |  |
Place of incorporation | PRC |
Date of incorporation | Dec. 31, 2005 |
Relationship | VIE’s subsidiary |
Percentage of direct or indirect economic ownership | 100.00% |
Principal activities | Development of software for related companies, provision of advertising services and production of broadcast television programs |
Xunlei Networking Technologies Beijing Co Ld [Member] |  |
Variable Interest Entity [Line Items] |  |
Place of incorporation | PRC |
Date of incorporation | Jun. 30, 2009 |
Relationship | VIE’s subsidiary |
Percentage of direct or indirect economic ownership | 100.00% |
Principal activities | Development of software for related companies | [1]
Xunlei Games Development (Shenzhen) Co., Ltd. [Member] |  |
Variable Interest Entity [Line Items] |  |
Place of incorporation | PRC |
Date of incorporation | Feb. 28, 2010 |
Relationship | VIE’s subsidiary |
Percentage of direct or indirect economic ownership | 70.00% |
Principal activities | Development of online game and computer software for related companies and provision of advertising services |
Xunlei Network Technologies Limited BVI [Member] |  |
Variable Interest Entity [Line Items] |  |
Place of incorporation | British Virgin Islands |
Date of incorporation | Feb. 28, 2011 |
Relationship | Subsidiary |
Percentage of direct or indirect economic ownership | 100.00% |
Principal activities | Holding company |
Xunlei Network Technologies Limited HK [Member] |  |
Variable Interest Entity [Line Items] |  |
Place of incorporation | Hong Kong |
Date of incorporation | Mar. 31, 2011 |
Relationship | Subsidiary |
Percentage of direct or indirect economic ownership | 100.00% |
Principal activities | Development computer software of related companies and provision of advertising services |
Xunlei Computer (Shenzhen) Co., Ltd. [Member] |  |
Variable Interest Entity [Line Items] |  |
Place of incorporation | PRC |
Date of incorporation | Nov. 30, 2011 |
Relationship | Subsidiary |
Percentage of direct or indirect economic ownership | 100.00% |
Principal activities | Development of computer software and provision of information technology services |
Shenzhen Onething Technologies Co Ltd [Member] |  |
Variable Interest Entity [Line Items] |  |
Place of incorporation | PRC |
Date of incorporation | Sep. 30, 2013 |
Relationship | VIE’s subsidiary |
Percentage of direct or indirect economic ownership | 100.00% |
Principal activities | Development of computer software, sale of hardware, and provision of information technology services |
Beijing Xunjing Technologies Co Ltd [Member] |  |
Variable Interest Entity [Line Items] |  |
Place of incorporation | PRC |
Date of incorporation | Oct. 31, 2015 |
Relationship | VIE’s subsidiary |
Percentage of direct or indirect economic ownership | 100.00% |
Principal activities | Development of computer software and provision of information technology services |
Shenzhen Crystal Interactive Technologies Co [Member] |  |
Variable Interest Entity [Line Items] |  |
Place of incorporation | PRC |
Date of incorporation | May 31, 2016 |
Relationship | VIE’s subsidiary |
Percentage of direct or indirect economic ownership | 100.00% |
Principal activities | Development of computer software and provision of information technology services |
Shenzhen Xunlei Venture Capital Partnership Enterprise [Member] |  |
Variable Interest Entity [Line Items] |  |
Place of incorporation | PRC |
Date of incorporation | Jun. 30, 2016 |
Relationship | VIE’s subsidiary |
Percentage of direct or indirect economic ownership | 99.00% |
Principal activities | Investments in industries and consultation in investments | [2]
Shenzhen Zhuolian Software Co., Ltd [Member] |  |
Variable Interest Entity [Line Items] |  |
Place of incorporation | PRC |
Date of incorporation | Jan. 31, 2010 |
Relationship | VIE’s subsidiary |
Percentage of direct or indirect economic ownership | 100.00% |
Principal activities | Provision of software technology development for related companies |
Beijing Onething Technologies Co., Ltd. [Member] |  |
Variable Interest Entity [Line Items] |  |
Place of incorporation | PRC |
Date of incorporation | Jan. 31, 2017 |
Relationship | VIE’s subsidiary |
Percentage of direct or indirect economic ownership | 100.00% |
Principal activities | Provision of technology services and development of computer software |
[1] | Beijing Xunlei was deregistered in 2017.
[2] | As at December 31, 2017, Xunlei Venture Capital was in the process of deregistration.

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