Accrued royalty fee.

No definition available.

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

- Definition

Collaboration funding payments and project selection costs.

+ References

No definition available.

+ Details

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

- Definition

Collaborative arrangement effective days.

+ References

No definition available.

+ Details

Name:	sva_CollaborativeArrangementEffectiveDays
Namespace Prefix:	sva_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the length of time the collaborative agreement is in effect subject to terms specified within the agreement.

+ References

No definition available.

+ Details

Name:	sva_CollaborativeArrangementTermOfAgreement
Namespace Prefix:	sva_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Collaborative arrangements and non collaborative arrangement license issue royalty

+ References

No definition available.

+ Details

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

- Definition

Collaborative arrangements and non collaborative arrangement license royalty payments upon achievement of benchmarks.

+ References

No definition available.

+ Details

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

- Definition

Represents the amount of collaborative arrangements and noncollaborative arrangement entrance fees and milestone payments.

+ References

No definition available.

+ Details

Name:	sva_CollaborativeArrangementsAndNoncollaborativeArrangementEntranceFeesAndMilestonePayments
Namespace Prefix:	sva_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the amount of milestone payments that will be made by the entity as per the collaboration agreement.

+ References

No definition available.

+ Details

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

- Definition

Represents the amount of non-refundable annual royalty payable by the entity as per the agreement.

+ References

No definition available.

+ Details

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

- Definition

Cooperation agreement, contract amount.

+ References

No definition available.

+ Details

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

- Definition

Initiation fee.

+ References

No definition available.

+ Details

Name:	sva_InitiationFee
Namespace Prefix:	sva_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Milestone fee recorded cost of goods sold.

+ References

No definition available.

+ Details

Name:	sva_MilestoneFeeRecordedCostOfGoodsSold
Namespace Prefix:	sva_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Outstanding liablity of royalty fee.

+ References

No definition available.

+ Details

Name:	sva_OutstandingLiablityOfRoyaltyFee
Namespace Prefix:	sva_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Royalty fee percentage.

+ References

No definition available.

+ Details

Name:	sva_RoyaltyFeePercentage
Namespace Prefix:	sva_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the royalty payments on net sales, expressed as a percentage, under collaborative agreement.

+ References

No definition available.

+ Details

Name:	sva_RoyaltyPaymentOnNetSales
Namespace Prefix:	sva_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 808
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479402/808-10-50-1

+ Details

Name:	us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of expense related to royalty payments under a contractual arrangement such as payment for mineral and drilling rights and use of technology or intellectual property.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

+ Details

Name:	us-gaap_RoyaltyExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	srt_CounterpartyNameAxis=sva_NationalInstituteOfHealthMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=sva_PatentLicenseAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=sva_InstituteForTranslationalVaccinologyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=sva_InstituteOfBiophysicsChineseAcademyOfSciencesMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	srt_CounterpartyNameAxis=sva_InstituteOfProcessEngineeringMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	srt_CounterpartyNameAxis=sva_AmericanTypeCultureCollectionMember
Namespace Prefix:
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Collaboration Agreements - Additional Information (Details) € in Thousands, $ in Thousands	1 Months Ended		12 Months Ended
	Apr. 30, 2014	Aug. 31, 2009 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2025 EUR (€)	Dec. 31, 2024 USD ($)	Dec. 31, 2024 EUR (€)	Dec. 31, 2023 USD ($)	Dec. 31, 2023 EUR (€)	Dec. 31, 2014 USD ($)	Dec. 31, 2014 EUR (€)	Dec. 31, 2025 EUR (€)
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Royalty expense			$ 15		$ 0		$ 80
Milestone fees recorded cost of goods sold			1,034	€ 899	598	€ 543	134	€ 124
Outstanding liablity of royalty fee			748								€ 651
National Institute of Health \| Patent License Agreement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Term of collaboration agreement		8 years
Collaborative arrangements and noncollaborative arrangement license issue royalty		$ 170
Collaborative arrangements and noncollaborative arrangement license royalty payments upon achievement of benchmarks			330
National Institute of Health \| Patent License Agreement \| Maximum [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Royalty payment on net sales		4.00%
National Institute of Health \| Patent License Agreement \| Minimum [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Royalty payment on net sales		1.50%
Collaborative arrangements and noncollaborative arrangement non refundable annual royalty		$ 8
Institute for Translational Vaccinology
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Term of collaboration agreement	50 years
Collaborative arrangements and noncollaborative arrangement milestone payments \| €										€ 1,500
Collaborative arrangements and noncollaborative arrangement entrance fees and milestone payments									$ 2,406
Institute of Biophysics, Chinese Academy of Sciences (CAS)
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Cooperation agreement, contract amount			8,351
Collaboration funding payments and project selection costs			$ 1,740		1,737		1,765
Institute of Process Engineering
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Term of collaboration agreement			5 years	5 years
Cooperation agreement, contract amount			$ 2,784
Collaboration funding payments and project selection costs			$ 557		$ 556		$ 565
American Type Culture Collection
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Term of collaboration agreement			30 years	30 years
Initiation fee			$ 1,807
Royalty fee percentage			0.50%	0.50%
Collaborative arrangement effective days			30 days	30 days
Accrued royalty fee			$ 723