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Operations and reorganization - Narrative Information (Details) |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Apr. 17, 2014 shares | Apr. 30, 2014 USD ($) shares | Dec. 31, 2016 USD ($) Vote | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Jun. 29, 2015 Partnership
Operations and reorganization |  |  |  |  |  |
Proceeds from IPO |  |  |  |  | $ 306,491,000 |
Repayment of amount due to SINA |  |  |  | $ 2,863,000 | 269,042,000 |
Interest expense |  |  | $ 0 | 0 | 2,838,000 |
SINA |  |  |  |  |  |
Operations and reorganization |  |  |  |  |  |
Repayment of amount due to SINA |  |  |  | 2,863,000 | 276,614,000 |
Interest expense |  |  |  |  | 2,838,000 |
SINA | Amount due to SINA |  |  |  |  |  |
Operations and reorganization |  |  |  |  |  |
Repayment of amount due to SINA |  |  |  |  | 276,600,000 |
Interest expense |  |  | $ 0 | $ 0 | $ 2,800,000 |
SINA | Amount due to SINA | Maximum |  |  |  |  |  |
Operations and reorganization |  |  |  |  |  |
Interest rate (as a percent) |  |  | 3.05% |  |  |
SINA | Amount due to SINA | Minimum |  |  |  |  |  |
Operations and reorganization |  |  |  |  |  |
Interest rate (as a percent) |  |  | 2.55% |  |  |
Alibaba | SINA |  |  |  |  |  |
Operations and reorganization |  |  |  |  |  |
Number of ordinary shares acquired by investor (in shares) | shares | 23,990,778 |  |  |  |  |
Class A ordinary shares |  |  |  |  |  |
Operations and reorganization |  |  |  |  |  |
Shares issued from conversion of preferred shares (in shares) | shares |  | 30,046,154 |  |  |  |
Number of votes each share is entitled to | Vote |  |  | 1 |  |  |
Number of Class A shares converted from Class B shares |  |  | 1 |  |  |
Class A ordinary shares | Alibaba |  |  |  |  |  |
Operations and reorganization |  |  |  |  |  |
Number of ordinary shares acquired by investor (in shares) | shares | 29,990,778 |  |  |  |  |
Class A ordinary shares | Alibaba | SINA |  |  |  |  |  |
Operations and reorganization |  |  |  |  |  |
Number of ordinary shares acquired by investor (in shares) | shares | 21,067,300 |  |  |  |  |
Class B ordinary shares |  |  |  |  |  |
Operations and reorganization |  |  |  |  |  |
Number of votes each share is entitled to | Vote |  |  | 3 |  |  |
IPO | Class A ordinary shares |  |  |  |  |  |
Operations and reorganization |  |  |  |  |  |
Issuance of shares (in shares) | shares |  | 19,320,000 |  |  |  |
Proceeds from IPO |  | $ 306,500,000 |  |  |  |
IPO | Class A ordinary shares | Alibaba |  |  |  |  |  |
Operations and reorganization |  |  |  |  |  |
Number of ordinary shares acquired by investor (in shares) | shares | 6,000,000 |  |  |  |  |
Weimeng |  |  |  |  |  |
Operations and reorganization |  |  |  |  |  |
Percentage of Direct/Indirect Economic Interest in VIEs |  |  | 100.00% |  |  |
Weibo Interactive |  |  |  |  |  |
Operations and reorganization |  |  |  |  |  |
Percentage of Direct/Indirect Economic Interest in VIEs |  |  | 100.00% |  |  |
Weibo HK |  |  |  |  |  |
Operations and reorganization |  |  |  |  |  |
Percentage of Direct/Indirect Economic Interest |  |  | 100.00% |  |  |
Weibo Technology |  |  |  |  |  |
Operations and reorganization |  |  |  |  |  |
Percentage of Direct/Indirect Economic Interest |  |  | 100.00% |  |  |
SINA |  |  |  |  |  |
Operations and reorganization |  |  |  |  |  |
Number of limited liability partnerships | Partnership |  |  |  |  |  | 2
SINA | Weibo Funds, one |  |  |  |  |  |
Operations and reorganization |  |  |  |  |  |
Equity interest percentage owned by parent |  |  |  |  |  | 55.00%
SINA | Weibo Funds, two |  |  |  |  |  |
Operations and reorganization |  |  |  |  |  |
Equity interest percentage owned by parent |  |  |  |  |  | 85.00%

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