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Related Party Transactions - Schedule of Relationship Between Related Parties with their Groups (Detail) | 12 Months Ended
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Dec. 31, 2017
Zhuhai Qianyou [Member] |
Schedule of Other Related Party Transactions [Line Items] |
Related parties relationship | Equity investment of the Group
Hao Cheng [Member] |
Schedule of Other Related Party Transactions [Line Items] |
Related parties relationship | Co-founder and shareholder of the Group
Chuan Wang [Member] |
Schedule of Other Related Party Transactions [Line Items] |
Related parties relationship | Director of the Company
Shenglong Zou [Member] |
Schedule of Other Related Party Transactions [Line Items] |
Related parties relationship | Co-founder and shareholder of the Group
Beijing Millet Technology Co., Ltd. (“Beijing Xiaomi”) [Member] |
Schedule of Other Related Party Transactions [Line Items] |
Related parties relationship | Company owned by a shareholder of the Group
Leading Advice Holdings Limited [Member] |
Schedule of Other Related Party Transactions [Line Items] |
Related parties relationship | Company owned by a Co-founder and shareholder of the Group
Vantage Point Global Limited [Member] |
Schedule of Other Related Party Transactions [Line Items] |
Related parties relationship | Shareholder of the Company
Aiden & Jasmine Limited [Member] |
Schedule of Other Related Party Transactions [Line Items] |
Related parties relationship | Shareholder of the Company
Kingsoft Corporation Limited [Member] |
Schedule of Other Related Party Transactions [Line Items] |
Related parties relationship | Shareholder of the Company
King Venture Holdings Limited [Member] |
Schedule of Other Related Party Transactions [Line Items] |
Related parties relationship | Principal shareholder of the Group (shareholding >=10%)
Xiaomi Venture Limited [Member] |
Schedule of Other Related Party Transactions [Line Items] |
Related parties relationship | Principal shareholder of the Group
Morningside Technology Investments Limited [Member] |
Schedule of Other Related Party Transactions [Line Items] |
Related parties relationship | Shareholder of the Group
Shenzhen Mojingou Information Service Co., Ltd [Member] |
Schedule of Other Related Party Transactions [Line Items] |
Related parties relationship | Equity investment of the Group
Shenzhen Xunlei Finance Information Service Co., Ltd. [Member] |
Schedule of Other Related Party Transactions [Line Items] |
Related parties relationship | Subsidiary of the Group’s equity investment
Shenzhen Crystal Technology Co., Ltd. [Member] |
Schedule of Other Related Party Transactions [Line Items] |
Related parties relationship | Company owned by a Co-founder and director of the Group
Millet Communication Technology Co., Ltd. (“Millet Communication Technology”) [Member] |
Schedule of Other Related Party Transactions [Line Items] |
Related parties relationship | Company owned by a shareholder of the Group
Beijing Millet Electronic Products Co., Ltd. [Member] |
Schedule of Other Related Party Transactions [Line Items] |
Related parties relationship | Company owned by a shareholder of the Group
Beijing Millet Digital Technology Co., Ltd. [Member] |
Schedule of Other Related Party Transactions [Line Items] |
Related parties relationship | Company owned by a shareholder of the Group
Millet Technology Co., Ltd. [Member] |
Schedule of Other Related Party Transactions [Line Items] |
Related parties relationship | Company owned by a shareholder of the Group
Shenzhen Thunder Trade Service Co., Ltd [Member] |
Schedule of Other Related Party Transactions [Line Items] |
Related parties relationship | Subsidiary of the Group’s equity investment
Shenzhen Thunder Economic Consulting Co., Ltd [Member] |
Schedule of Other Related Party Transactions [Line Items] |
Related parties relationship | Subsidiary of the Group’s equity investment
Shenzhen thunderbolt Digital Technology Co., Ltd [Member] |
Schedule of Other Related Party Transactions [Line Items] |
Related parties relationship | Subsidiary of the Group’s equity investment
Beijing Millet Mobile Software Co., Ltd [Member] |
Schedule of Other Related Party Transactions [Line Items] |
Related parties relationship | Company owned by a shareholder of the Group
Guangzhou Millet Information Service Co., Ltd [Member] |
Schedule of Other Related Party Transactions [Line Items] |
Related parties relationship | Company owned by a shareholder of the Group
Shenzhen Xunyi Network Technology Corp., Ltd. Shenzhen Xunyi [Member] |
Schedule of Other Related Party Transactions [Line Items] |
Related parties relationship | Company operated by few former core members of Xunlei’s web game business

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- Definition Schedule of Other Related Party Transactions [Line Items] + References No definition available. + Details
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