CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Royalty Revenue
Amortization of capitalized fees paid to a related party	$ 3,456	$ 3,456

Represents the amortization of capitalized fees paid to a related party.

No definition available.

Name:	inva_AmortizationOfCapitalizedFeesPaidToRelatedParty
Namespace Prefix:	inva_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration