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Additional information: condensed financial statements of the Company - Schedule of Condensed Balance Sheets (Detail) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | --- | --- | ---
Current assets: |  |  |  |  |
Cash and cash equivalents |  | $ 233,479 | $ 199,504 | $ 361,777 | $ 404,275
Prepayments and other current assets |  | 6,866 | 13,593 |  |
Total current assets |  | 430,783 | 412,305 |  |
Non-current assets: |  |  |  |  |
Property, equipment and software, net |  | 24,685 | 20,996 |  |
Total assets |  | 533,437 | 509,795 |  |
Current liabilities: |  |  |  |  |
Accounts payable |  | 49,819 | 33,376 |  |
Deferred revenue and income, current portion |  | 28,046 | 23,194 |  |
Total current liabilities |  | 141,696 | 93,405 |  |
Non-current liabilities: |  |  |  |  |
Deferred revenue and income, non-current | [1] | 3,242 | 4,082 |  |
Due to related parties, non-current portion |  | 4,737 | 4,537 |  |
Other long-term payable |  | 925 | 886 |  |
Total liabilities |  | 150,600 | 103,545 |  |
Commitments and contingencies |  |  |  |  |
Shareholders' equity |  |  |  |  |
Common shares |  | 83 | 83 |  |
Treasury shares 38,332,209 shares as at December 31, 2016 and 35,233,649 shares as at December 31, 2017 |  | (9) | (9) |  |
Total Xunlei Limited’s shareholders’ equity |  | 384,997 | 408,238 | 444,681 | 457,021
Total liabilities and shareholders’ equity |  | 533,437 | 509,795 |  |
Xunlei Limited [Member] |  |  |  |  |
Current assets: |  |  |  |  |
Cash and cash equivalents |  | 280,196 | 273,160 | $ 292,175 | $ 309,457
Due from subsidiaries and consolidated VIEs |  | 98,129 | 101,130 |  |
Prepayments and other current assets |  | 439 | 348 |  |
Total current assets |  | 378,764 | 374,638 |  |
Non-current assets: |  |  |  |  |
Property, equipment and software, net |  | 1 | 3 |  |
Investments in subsidiaries and consolidated VIEs |  | 17,375 | 43,447 |  |
Total assets |  | 396,140 | 418,088 |  |
Current liabilities: |  |  |  |  |
Accounts payable |  | 55 | 55 |  |
Due to subsidiaries and consolidated VIEs |  | 4,079 | 1,862 |  |
Deferred revenue and income, current portion |  | 308 | 272 |  |
Accrued liabilities and other payables |  | 732 | 1,695 |  |
Total current liabilities |  | 5,174 | 3,884 |  |
Non-current liabilities: |  |  |  |  |
Deferred revenue and income, non-current |  | 308 | 543 |  |
Due to related parties, non-current portion |  | 4,737 | 4,537 |  |
Other long-term payable |  | 925 | 886 |  |
Total liabilities |  | 11,144 | 9,850 |  |
Commitments and contingencies |  |  |  |  |
Shareholders' equity |  |  |  |  |
Common shares |  | 83 | 83 |  |
Treasury shares 38,332,209 shares as at December 31, 2016 and 35,233,649 shares as at December 31, 2017 |  | 9 | 9 |  |
Other shareholders' equity |  | 384,904 | 408,146 |  |
Total Xunlei Limited’s shareholders’ equity |  | 384,996 | 408,238 |  |
Total liabilities and shareholders’ equity |  | $ 396,140 | $ 418,088 |  |
[1] | As of December 31, 2017, the non-current portion included membership subscription revenue of USD 425,000 (2016: USD 820,000), government grants of USD 2,509,000 (2016: USD 2,719,000), and reimbursement from the depositary of USD 308,000 (2016: USD 543,000).

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- Definition Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Also includes the aggregate carrying amount, as of the balance sheet date, of liabilities not separately disclosed in the balance sheet. + References No definition available. + Details
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- Definition Due from subsidiaries and variable interest entities. + References No definition available. + Details
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- Definition Due to subsidiaries and variable interest entities. + References No definition available. + Details
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- Definition Investment in subsidiaries and variable interest entities. + References No definition available. + Details
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- Definition Other Shareholders Equity + References No definition available. + Details
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- Definition Amount of taxes withheld with respect to a stock repurchase as required under the applicable laws and repayable to the seller if not subject to such taxes. + References No definition available. + Details
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