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Income Taxes (Details) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended | 0 Months Ended | 12 Months Ended | 8 Months Ended | 12 Months Ended
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Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($) | Dec. 31, 2011 USD ($) | Dec. 31, 2013 PRC subsidiaries USD ($) | Dec. 31, 2013 PRC subsidiaries CNY | Dec. 31, 2013 PRC | Dec. 31, 2013 PRC Minimum | Dec. 31, 2013 PRC Maximum | Jan. 18, 2012 PRC Sinovac Beijing USD ($) | Dec. 31, 2013 PRC Sinovac Beijing | Dec. 31, 2012 PRC Sinovac Beijing | Dec. 31, 2011 PRC Sinovac Beijing | Dec. 31, 2014 PRC Sinovac Beijing Future Tax Rate | Dec. 31, 2012 PRC Sinovac Beijing Approval, subject to reassessment, of preferential 5% withholding tax on dividends declared by Sinovac Beijing to Sinovac Hong Kong | Dec. 31, 2013 PRC Sinovac Beijing Approval, subject to reassessment, of preferential 5% withholding tax on dividends declared by Sinovac Beijing to Sinovac Hong Kong | Dec. 31, 2012 PRC Sinovac Beijing Approval, subject to reassessment, of preferential 5% withholding tax on dividends declared by Sinovac Beijing to Sinovac Hong Kong | Dec. 31, 2014 PRC Sinovac Beijing Approval, subject to reassessment, of preferential 5% withholding tax on dividends declared by Sinovac Beijing to Sinovac Hong Kong Future Tax Rate | Dec. 31, 2012 PRC Sinovac Beijing If reassessment does not approve preferential 5% withholding tax on dividends declared by Sinovac Beijing to Sinovac Hong Kong USD ($) | Dec. 31, 2013 PRC Tangshan Yian | Dec. 31, 2013 PRC Sinovac R&D | Dec. 31, 2013 PRC Sinovac Dalian
Income Taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unified income tax rate (as a percent) | 25.00% | 25.00% | 25.00% |  |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  | 25.00% | 25.00% | 25.00%
Preferential income tax rate (as a percent) |  |  |  |  |  |  |  |  |  | 15.00% | 15.00% | 15.00% | 15.00% |  |  |  |  |  |  |  |
Period after which preferential income tax rates need to be reviewed |  |  |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |
Withholding income tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Withholding tax rate on dividends paid by mainland PRC resident company to beneficial owner that is a resident of Hong Kong and that directly owns less than 25 percent of the PRC company paying the dividend (as a percent) |  |  |  |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Withholding tax rate on dividends paid by mainland PRC resident company to beneficial owner that is a resident of Hong Kong and that directly owns at least 25 percent of the PRC company paying the dividend (as a percent) |  |  |  |  |  |  |  | 5.00% |  |  |  |  |  | 5.00% | 5.00% |  | 5.00% |  |  |  |
Beneficial ownership percentage of foreign invested enterprises by Hong Kong resident company to qualify for lower 5% dividend tax rate |  |  |  |  |  |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Period for withholding tax rate on dividend distributed by foreign-invested enterprises to its direct holding company in Hong Kong (in years) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 years |  |  |  |  |
Decrease in withholding tax recovery on dividend distributed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 867 |  |  |
Increase in basic and diluted loss per common share (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (0.02) |  |  |
Withholding taxes paid on dividend declared to Sinovac Hong Kong |  |  |  |  |  |  |  |  | 865 |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) before income tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non - PRC | (65) | (527) | (301) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
PRC | 8,210 | (19,106) | 4,968 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total | 8,145 | (19,633) | 4,667 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income taxes attributed to the operations in China |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current |  | 867 | (2,221) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred | 2,225 | 17 | (2,845) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total income tax benefit (expense) | 2,225 | 884 | (5,066) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reconciliation of income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) before income tax expense and non-controlling interests | 8,145 | (19,633) | 4,667 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax expense at PRC statutory rate | (2,036) | 4,909 | (1,167) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
International tax rate differential | (16) | (40) | (300) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other adjustments | 228 | 59 | (290) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Permanent differences | 387 | 1,051 | (207) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Effect of preferential tax treatment | 1,573 | (648) | 1,225 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Change in valuation allowance | 2,089 | (5,314) | (4,327) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Effect of withholding tax at 5% on the distributable profits of the Company's PRC subsidiaries |  | 867 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total income tax benefit (expense) | 2,225 | 884 | (5,066) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax effects of temporary differences giving rise to deferred tax assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued expenses | 1,982 | 1,744 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inventories | 729 | 649 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax losses carried forward | 10,545 | 10,315 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Less: valuation allowance | (10,654) | (12,708) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred tax assets, current portion | 2,602 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed assets | 576 | 940 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Less: valuation allowance | (459) | (494) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred tax assets, non-current portion | 117 | 446 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valuation allowance | (11,113) | (13,202) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carry forward of tax losses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred tax benefit on temporary difference due to excess of the tax base of the land use rights, and licenses over the carrying value | 2,719 | 446 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax losses carried forward |  |  |  | 43,483 | 263,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Period over which tax losses can be carried forward |  |  |  | 5 years | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Provision for withholding income taxes for retained earnings | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term of statute of limitation |  |  |  |  |  |  | 3 years | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized tax benefit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at the beginning of the period | 345 | 198 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additions based on tax positions related to the current year | 25 | 147 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at the end of the period | 370 | 345 | 198 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest and penalties recorded | $ 0 | $ 0 | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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