Percentage of equity interest right to purchase upon exercise of stock options.

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Percentage of equity upon exercise of options.

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Share-based compensation arrangement by share-based payment award, options, grants in period, grant date fair value.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Face amount or stated value per share of common stock.

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Amount of cost to be recognized for option under share-based payment arrangement.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Date the equity-based award expires, in YYYY-MM-DD format.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Net number of share options (or share units) granted during the period.

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Gross number of share options (or share units) granted during the period.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Maximum number of shares that may be issued in accordance with the plan as a proportion of outstanding capital stock.

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No definition available.

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Description of modification of award under share-based payment arrangement. Includes, but is not limited to, terms for expiration date, vesting rights and exercise price.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Percentage of vesting of award under share-based payment arrangement.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Number of shares issued during the period related to Restricted Stock Awards, net of any shares forfeited.

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Stock Options - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands							12 Months Ended
	Mar. 07, 2021	Sep. 16, 2020	Mar. 07, 2018	May 01, 2016	May 01, 2015	Aug. 22, 2012	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period, shares, restricted stock award, net of forfeitures			2,000,000
Common Stock, Par or Stated Value Per Share			$ 0.001				$ 0.001	$ 0.001
Allocated Share-based Compensation Expense								$ 7,735	$ 10,203
Share-based Compensation Award, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage	60.00%		60.00%
Share-based Compensation Award, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage			40.00%
Share-based Compensation Award, Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage			40.00%
2012 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period, shares, restricted stock award, net of forfeitures					729,000
Share-based compensation arrangement by share-based payment award, options, grants in period, net of forfeitures					1,341,000
Share-based compensation arrangements by share-based payment award, options, grants in period, weighted average exercise price					$ 4.98
Share-based compensation arrangement by share-based payment award, expiration date					Apr. 30, 2023
Share-based compensation arrangement by share-based payment award, plan modification, description and terms							the board of directors approved that an additional 30% of the Options to be vested on December 16, 2016, and restrictions of an additional 30% of the Restricted Shares were removed on December 16, 2016. On April 25, 2018, the board of directors approved that all remaining unvested Options and Restricted Shares that were granted on May 1, 2015 were fully vested on April 25, 2018.
2012 Plan \| Share-based Compensation Award, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage				20.00%
2020 ESOP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price of options vested, granted to officers and employees		$ 12,000
Share-based compensation arrangement by share-based payment Award, options vesting period		8 years
Expected volatility							73.22%
Expected life							2 years
Risk-free interest rate							2.72%
Dividend rate							0.00%
Stock options granted							0	0
2020 ESOP \| Maximum [Member] \| Sinovac LS
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of equity interest right to purchase upon exercise of stock options		15.00%
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, percentage of outstanding Stock maximum							10.00%
Stock options \| 2012 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares authorized						4,000,000
Employee service share-based compensation, nonvested awards, compensation not yet recognized, stock options							$ 0
Stock options \| 2012 Plan \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, expiration period						10 years
Stock options \| 2003 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares available for grant							42,800
Share-based compensation arrangement by share-based payment award, options, exercises in period, intrinsic value								$ 257	$ 598
Stock options \| 2003 Plan \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, expiration period							10 years
Stock options \| 2020 ESOP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value of options issued							$ 7,200
Share-based compensation arrangement by share-based payment award, options, exercises in period, intrinsic value							$ 3,000
Stock options \| 2020 ESOP \| Sinovac LS
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of equity upon exercise of options							15.00%
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Par or Stated Value Per Share					$ 0.001
Restricted Stock \| 2012 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee service share-based compensation, nonvested awards, compensation not yet recognized, stock options							$ 0