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Additional Information-Condensed Financial Statements of Weibo Corporation - Statements of Comprehensive Income (Loss) (Parenthetical) (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Statements of Comprehensive Income (Loss) |  |  |
Currency translation adjustments, tax | $ 0 | $ 0 | $ 0
Change in unrealized loss from available-for-sale securities, tax | 0 | 0 | 0
Reclassification adjustment for net loss included in net income (loss), tax | 0 | 0 | 0
Weibo Corporation |  |  |
Statements of Comprehensive Income (Loss) |  |  |
Currency translation adjustments, tax | 0 | 0 | 0
Change in unrealized loss from available-for-sale securities, tax | 0 | 0 | 0
Reclassification adjustment for net loss included in net income (loss), tax | $ 0 | $ 0 | $ 0

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