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Additional Information-Condensed Financial Statements of Weibo Corporation - Statements of Cash flow (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Statements of Cash flow |  |  |
Net cash provided by (used in) operating activities | $ 236,244 | $ 181,971 | $ (19,412)
Purchase of short-term investments | (314,363) | (149,374) | (230,161)
Maturity of short-term investments | 373,805 | 216,615 | 321,208
Investments and prepayments on equity investments | (155,122) | (268,758) | (54,383)
Net cash provided by (used in) investing activities | (96,745) | (228,310) | 13,917
Proceeds from IPO, net of commission |  |  | 306,491
Repayment of amount due to SINA |  | (2,863) | (269,042)
Proceeds from employee options exercised | 4,183 | 7,822 | 1,508
Net cash provided by financing activities | 3,035 | 4,959 | 43,663
Cash and cash equivalents at the beginning of the year | 237,440 | 284,865 | 249,099
Cash and cash equivalents at the end of the year | 364,766 | 237,440 | 284,865
Weibo Corporation |  |  |
Statements of Cash flow |  |  |
Net cash provided by (used in) operating activities | 1,025 | 5,317 | (627)
Purchase of short-term investments | (30,046) | (148,863) | (230,161)
Maturity of short-term investments | 97,798 | 218,762 | 321,208
Investments and prepayments on equity investments | (120,000) | (247,200) | (15,096)
Investment in subsidiaries | (6,535) | (4,978) | (68,873)
Net cash provided by (used in) investing activities | (58,783) | (182,279) | 7,078
Proceeds from IPO, net of commission |  |  | 301,270
Repayment of amount due to SINA |  |  | (255,688)
Proceeds from employee options exercised | 4,183 | 7,822 | 1,508
Others |  |  | (6,462)
Net cash provided by financing activities | 4,183 | 7,822 | 40,628
Net increase (decrease) in cash and cash equivalents | (53,575) | (169,140) | 47,079
Cash and cash equivalents at the beginning of the year | 60,810 | 229,950 | 182,871
Cash and cash equivalents at the end of the year | 7,235 | 60,810 | 229,950
Supplemental schedule of non-cash investing and financing activities |  |  |
Investment in subsidiaries and VIE directly financed by SINA | $ 18,277 | $ 17,582 | $ 6,413

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