The total number of Board members of the Investee.

No definition available.

Name:	inva_NumberOfBoardMembersOfInvestee
Namespace Prefix:	inva_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of the Company's Board members currently serving on the Investee's Board.

+ References

No definition available.

+ Details

Name:	inva_NumberOfCompanysBoardMembersCurrentlyServingOnBoardOfInvestee
Namespace Prefix:	inva_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount the Company agreed to pay for common stock and warrants upon satisfaction of certain closing conditions under the terms of the securities purchase agreement.

+ References

No definition available.

+ Details

Name:	inva_SecuritiesPurchaseAgreementAmount
Namespace Prefix:	inva_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The total number of shares to be purchased under the terms of a securities purchase agreement.

+ References

No definition available.

+ Details

Name:	inva_SecuritiesPurchaseAgreementTotalNumberOfSharesToBePurchasedUnderAgreement
Namespace Prefix:	inva_
Data Type:	xbrli:sharesItemType
Balance Type:	na
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://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481687/323-10-50-3

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(2))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483467/210-10-45-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1A
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482736/825-10-45-1A

+ Details

Name:	us-gaap_EquitySecuritiesFvNi
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

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

- Definition

The cash outflow for cost incurred directly with the issuance of an equity security.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-15

+ Details

Name:	us-gaap_PaymentsOfStockIssuanceCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	srt_ConsolidatedEntitiesAxis=inva_NanoliveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=inva_ConsolidatedInvesteesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_SeriesCPreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Equity and Long-term Investments and Fair Value Measurements - Equity Investment in Nanolive (Details) - Nanolive SFr in Millions, $ in Millions	Feb. 18, 2022 USD ($) shares	Feb. 18, 2022 CHF (SFr) shares	Sep. 30, 2023 USD ($) Director	Dec. 31, 2022 USD ($)
Equity Investment
Transaction costs to acquire equity securities \| $	$ 0.7
Number of Investee's Board members currently representing the Company \| Director			1
Number of the Investee's Board members \| Director			7
Fair value of equity securities \| $			$ 10.6	$ 10.6
Consolidated Investees [Member]
Equity Investment
Equity investment ownership percentage			15.30%	15.50%
Series C preferred stock
Equity Investment
Number of shares to be purchased under the securities purchase agreement \| shares	18,750,000	18,750,000
Amount of securities purchase agreement	$ 9.8	SFr 9.0