Capital contribution in subsidiary.

No definition available.

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Namespace Prefix:	sva_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage of equity interest purchased upon exercise of stock options.

+ References

No definition available.

+ Details

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Namespace Prefix:	sva_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Proceeds from investment in subsidiary.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Balance Type:	credit
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- Definition

This element represents the aggregate cost of investments accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 1
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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+ Details

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Balance Type:	na
Period Type:	instant

- Definition

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.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Amount of increase in noncontrolling interest from a business combination.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 810
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- Details

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- Details

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- Details

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Basis of Presentation - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended			12 Months Ended
	Nov. 30, 2020	Sep. 30, 2020	May 31, 2020	Dec. 31, 2020
Sinovac LS
Minority Interest [Line Items]
Debt conversion, converted instrument, amount			$ 15,000
Ownership percentage				12.69%
Total financing expenses				$ 1,000
Sinovac LS \| Sino Biopharmaceutical Limited
Minority Interest [Line Items]
Proceeds from investment in subsidiary				$ 527,000
Equity interest percentage				15.38%
Sinovac LS \| Vivo Capital
Minority Interest [Line Items]
Ownership percentage				6.345%
Sinovac Dalian
Minority Interest [Line Items]
Capital contribution in subsidiary	$ 6,972
Prime Success L P \| Sinovac LS
Minority Interest [Line Items]
Ownership percentage				6.345%
Dalian Jin Gang Group \| Sinovac Dalian
Minority Interest [Line Items]
Capital contribution by non controlling shareholder	$ 3,193
Maximum [Member] \| 2020 ESOP \| Sinovac LS
Minority Interest [Line Items]
Percentage of equity interest purchased upon exercise of stock options		15.00%