No definition available.

Name:	iova_EquityClaim
Namespace Prefix:	iova_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The total number of new claims filed where the defendant has no direct liability or alleged wrongdoing.

No definition available.

Name:	iova_NominalDefendantNewClaimsFiledNumber
Namespace Prefix:	iova_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The number of shares allegedly issued in breach of fiduciary duty, during the period.

No definition available.

Name:	iova_SharesIssuedInBreachOfFiduciaryDuty
Namespace Prefix:	iova_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

The number of equity instruments that the holder of the debt instrument would receive if the debt was converted to equity.

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Name:	us-gaap_DebtInstrumentConvertibleNumberOfEquityInstruments
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Face (par) amount of debt instrument at time of issuance.

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-Topic 835
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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.

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The value (monetary amount) of the award the plaintiff seeks in the legal matter.

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Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

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The total number of new claims filed pertaining to a loss contingency during the period.

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Balance Type:	na
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Amount of cash inflow from debt classified as other.

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-Name Accounting Standards Codification
-Topic 230
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Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

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