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DESCRIPTION OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Related Party Transactions (Details) | Dec. 31, 2020
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GSK |
Related Parties |
Percentage of common stock owned by a related party | 31.60%
Sarissa Capital |
Related Parties |
Percentage of common stock owned by a related party | 6.30%

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- Definition The percentage of ownership of common stock in the reporting entity owned by related parties. + References No definition available. + Details
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Namespace Prefix: | inva_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- 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_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=inva_SarissaCapitalManagementLpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |