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Income Taxes (Details) $ / shares in Units, $ in Thousands |  | 12 Months Ended
--- | --- | ---
Feb. 22, 2008 | Dec. 31, 2016 USD ($) jurisdiction $ / shares | Dec. 31, 2015 USD ($) $ / shares | Dec. 31, 2014 USD ($) | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009 | Dec. 31, 2008
Income taxes |  |  |  |  |  |  |  |  |  |
Number of taxable jurisdictions | jurisdiction |  | 2 |  |  |  |  |  |  |  |
Components of loss before income taxes |  |  |  |  |  |  |  |  |  |
Income (Loss) before income tax expenses |  | $ 109,980 | $ 36,780 | $ (64,340) |  |  |  |  |  |
Loss from non-China operations |  | (60,193) | (28,016) | (54,073) |  |  |  |  |  |
Income (Loss) from China operations |  | 170,173 | 64,796 | (10,267) |  |  |  |  |  |
Income tax expense applicable to China operations |  | $ 4,316 | $ 2,591 | $ 1,128 |  |  |  |  |  |
Effective tax rate for China operations (as a percent) |  | 2.50% | 4.00% | (11.00%) |  |  |  |  |  |
Loss from the change in fair value of investor option liability |  |  |  | $ 46,972 |  |  |  |  |  |
Loss from investment impairments |  | $ (31,586) | $ (6,608) | $ (2,521) |  |  |  |  |  |
Income tax rate (as a percent) |  | 25.00% | 25.00% | 25.00% |  |  |  |  |  |
Net operating loss carry forwards |  | $ 129,300 | $ 160,500 |  |  |  |  |  |  |
Composition of income tax expenses for China operations |  |  |  |  |  |  |  |  |  |
Deferred tax expenses (benefits) |  | (4,630) | (977) | $ 866 |  |  |  |  |  |
Current income tax expenses |  | 8,946 | 3,568 | 262 |  |  |  |  |  |
Income tax expenses |  | $ 4,316 | $ 2,591 | $ 1,128 |  |  |  |  |  |
Reconciliation of the statutory tax rate to the effective tax rate for China operations |  |  |  |  |  |  |  |  |  |
Statutory EIT rate (as a percent) |  | 25.00% | 25.00% | 25.00% |  |  |  |  |  |
Effect on tax holiday (as a percent) |  | (29.60%) | (24.20%) |  |  |  |  |  |  |
Permanent differences (as a percent) |  | 1.20% | 0.50% | 2.20% |  |  |  |  |  |
Change in valuation allowance (as a percent) |  | 5.90% | 2.70% | (38.20%) |  |  |  |  |  |
Effective tax rate for China operations (as a percent) |  | 2.50% | 4.00% | (11.00%) |  |  |  |  |  |
Deferred tax assets: |  |  |  |  |  |  |  |  |  |
Net operating loss carry forwards |  | $ 32,158 | $ 41,604 |  |  |  |  |  |  |
Less: valuation allowance |  | (32,158) | (41,604) |  |  |  |  |  |  |
Depreciation, accounts receivable, accrued and other liabilities |  | 13,957 | 4,550 |  |  |  |  |  |  |
Less: valuation allowance |  | (8,576) | (3,057) |  |  |  |  |  |  |
Net deferred tax assets |  | 5,381 | 1,493 |  |  |  |  |  |  |
Valuation allowance on deferred tax assets |  | 40,700 | 44,700 |  |  |  |  |  |  |
Deferred tax liabilities: |  |  |  |  |  |  |  |  |  |
Acquired intangible assets |  | 274 | 477 |  |  |  |  |  |  |
Depreciation |  | 362 | 295 |  |  |  |  |  |  |
Others |  | 181 | 566 |  |  |  |  |  |  |
Total deferred tax liabilities |  | $ 817 | 1,338 |  |  |  |  |  |  |
Historical rate for valuing deferred tax assets (as a percent) |  | 25.00% |  |  |  |  |  |  |  |
Weibo Technology |  |  |  |  |  |  |  |  |  |
Reconciliation of the statutory tax rate to the effective tax rate for China operations |  |  |  |  |  |  |  |  |  |
Effect of tax exemption |  | $ 50,400 | $ 15,700 |  |  |  |  |  |  |
Effect of tax exemption on basic net income per share (USD per share) | $ / shares |  | $ 0.23 | $ 0.08 |  |  |  |  |  |  |
Non- China |  |  |  |  |  |  |  |  |  |
Components of loss before income taxes |  |  |  |  |  |  |  |  |  |
Loss from the change in fair value of investor option liability |  |  |  | $ 47,000 |  |  |  |  |  |
Loss from investment impairments |  | $ 23,800 |  |  |  |  |  |  |  |
Cayman Islands |  |  |  |  |  |  |  |  |  |
Components of loss before income taxes |  |  |  |  |  |  |  |  |  |
Withholding income tax on dividends distributed by subsidiaries to its immediate holding entity outside China (as a percent) |  | 0.00% |  |  |  |  |  |  |  |
Hong Kong |  |  |  |  |  |  |  |  |  |
Components of loss before income taxes |  |  |  |  |  |  |  |  |  |
Income tax rate (as a percent) |  | 16.50% | 16.50% | 16.50% |  |  |  |  |  |
Net operating loss carry forwards |  | $ 1,400 |  |  |  |  |  |  |  |
Reconciliation of the statutory tax rate to the effective tax rate for China operations |  |  |  |  |  |  |  |  |  |
Statutory EIT rate (as a percent) |  | 16.50% | 16.50% | 16.50% |  |  |  |  |  |
China |  |  |  |  |  |  |  |  |  |
Components of loss before income taxes |  |  |  |  |  |  |  |  |  |
Income tax rate (as a percent) |  | 25.00% | 25.00% | 25.00% | 25.00% | 25.00% | 25.00% | 25.00% | 25.00% | 25.00%
Withholding income tax on dividends distributed by subsidiaries to its immediate holding entity outside China (as a percent) |  | 10.00% |  |  |  |  |  |  |  |
Maximum percentage of withholding income tax on dividends distributed by subsidiaries to its immediate holding entity in Hong Kong |  | 5.00% |  |  |  |  |  |  |  |
Percentage of ownership interests held by foreign investors |  | 25.00% |  |  |  |  |  |  |  |
Percentage of withholding income tax on dividends distributed by PRC subsidiaries to its immediate holding company in Hong Kong |  | 5.00% |  |  |  |  |  |  |  |
Reconciliation of the statutory tax rate to the effective tax rate for China operations |  |  |  |  |  |  |  |  |  |
Statutory EIT rate (as a percent) |  | 25.00% | 25.00% | 25.00% | 25.00% | 25.00% | 25.00% | 25.00% | 25.00% | 25.00%
China | Software enterprise |  |  |  |  |  |  |  |  |  |
Components of loss before income taxes |  |  |  |  |  |  |  |  |  |
Period of income tax exemption | 2 years |  |  |  |  |  |  |  |  |
Reduction in preferential tax rate (as a percent) | 50.00% |  |  |  |  |  |  |  |  |
Preferential statutory rate (as a percent) | 12.50% |  |  |  |  |  |  |  |  |
Period of reduced preferential income tax rate | 3 years |  |  |  |  |  |  |  |  |

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- Definition The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32639-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 + Details
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- Definition The amount of income taxes from which a reporting entity is exempt or for which it will receive a reduction in income taxes as a result of the income tax holiday granted by the taxing jurisdiction. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 11.C) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330215-122817 + Details
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- Definition Per share amount effect of the income tax benefit resulting from the income tax holidays granted by taxing jurisdictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 11.C) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330215-122817 + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32559-109319 + Details
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- Definition The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32559-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 30 -Paragraph 5 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=64814285&loc=d3e30536-109315 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from depreciation, accounts receivables, accrued and other liabilities. + References No definition available. + Details
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- Definition The portion of the difference between the effective income tax rate and the domestic federal statutory income tax rate attributable to permanent differences. + References No definition available. + Details
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- Definition The minimum direct ownership percentage in the foreign invested enterprises owned by the foreign investor, determining whether the lower withholding income tax rate can be applied for dividends distributed by the foreign invested enterprise to its immediate holding entity in Hong Kong. + References No definition available. + Details
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