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Additional information: condensed financial statements of the Company - Schedule of Condensed Statement of Cash Flows (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Cash flows from financing activities |  |  |
Net increase/(decrease) in cash, cash equivalents and restricted cash | $ 45,788 | $ (104,036) | $ 23,553
Cash, cash equivalents and restricted cash at beginning of year | 122,930 | 233,479 | 199,504
Effect of exchange rates on cash and cash equivalents, and restricted cash | (3,270) | (6,513) | 10,422
Cash, cash equivalents, and restricted cash at end of year | 165,448 | 122,930 | 233,479
Xunlei Limited [Member] |  |  |
Cash flows from operating activities |  |  |
Net cash used in operating activities | (171,796) | (88,309) | (25,333)
Cash flows from investing activities |  |  |
Net cash generated from investing activities | 52,359 | 37,788 | 32,670
Cash flows from financing activities |  |  |
Net cash used in financing activities |  |  | (301)
Net increase/(decrease) in cash, cash equivalents and restricted cash | (119,437) | (50,521) | 7,036
Cash, cash equivalents and restricted cash at beginning of year | 229,675 | 280,196 | 273,160
Effect of exchange rates on cash and cash equivalents, and restricted cash | 0 | 0 | 0
Cash, cash equivalents, and restricted cash at end of year | $ 110,238 | $ 229,675 | $ 280,196

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- Definition Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3521-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3044-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=98513485&loc=SL98516268-108586 + Details
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