Name:	ifrs-full_DisclosureOfJointOperationsLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The proportion of ownership interest in a joint operation attributable to the entity. [Refer: Total for all joint operations [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2025-01-01
-Paragraph 21
-Subparagraph a
-Clause iv
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2025-en-r&anchor=para_21_a_iv&doctype=Standard
-URIDate 2025-03-27

Name:	ifrs-full_ProportionOfOwnershipInterestInJointOperation
Namespace Prefix:	ifrs-full_
Data Type:	dtr-2022:percentItemType
Balance Type:	na
Period Type:	duration

The amount of decrease in carrying value of investment in joint operations upon exchange of ownership interest.

No definition available.

Name:	isou_InvestmentInJointOperationDecreaseInCarryingValueUponExchangeOfOwnershipInterest
Namespace Prefix:	isou_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Number of projects under the joint venture operation.

No definition available.

Name:	isou_JointOperationsNumberOfProjects
Namespace Prefix:	isou_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Number of marketable securities in exchange of ownership interest in joint venture.

No definition available.

Name:	isou_NumberOfMarketableSecuritiesInExchangeOfOwnershipInterestInJointOperation
Namespace Prefix:	isou_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Represents the option to purchase percentage in net smelter return royalty which is obtained upon relinquishment of interest in joint operation.

No definition available.

Name:	isou_OptionToPurchasePercentageOfNetSmelterReturnRoyaltyObtainedUponRelinquishmentOfInterestInJointOperation
Namespace Prefix:	isou_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Represents the consideration pertaining to option to purchase percentage in net smelter return royalty which is obtained upon relinquishment of interest in joint operation.

No definition available.

Name:	isou_OptionToPurchasePercentageOfNetSmelterReturnRoyaltyObtainedUponRelinquishmentOfInterestInJointOperationConsideration
Namespace Prefix:	isou_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Percentage of net smelter return royalty upon relinquishment of interest in joint operation.

No definition available.

Name:	isou_PercentageOfNetSmelterReturnRoyaltyUponRelinquishmentOfInterestInJointOperation
Namespace Prefix:	isou_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

The amount of consideration to be paid for the purchase of additional interest upon exercising option.

No definition available.

Name:	isou_ProportionOfOwnershipInterestInJointOperationAdditionalOptionToPurchaseConsideration
Namespace Prefix:	isou_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The expiry period of addition option following material uranium discovery under joint operation.

No definition available.

Name:	isou_ProportionOfOwnershipInterestInJointOperationAdditionalOptionToPurchaseExpiryPeriodUponMaterialUraniumDiscovery
Namespace Prefix:	isou_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Percentage of ownership interest in joint operation with an option to purchase.

No definition available.

Name:	isou_ProportionOfOwnershipInterestInJointOperationAdditionalOptionToPurchasePercent
Namespace Prefix:	isou_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Percentage of ownership interest in joint operation if exchange option exercised.

No definition available.

Name:	isou_ProportionOfOwnershipInterestInJointOperationIfExchangeOptionExercised
Namespace Prefix:	isou_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Percentage of ownership interest in joint operation with an option to exchange.

No definition available.

Name:	isou_ProportionOfOwnershipInterestInJointOperationOptionToExchangePercent
Namespace Prefix:	isou_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Threshold percentage interest in joint operation triggering relinquishment and entitled with net smelter return.

No definition available.