- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	ifrs-full_
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Period Type:	duration

- Definition

The carrying amount of Flow-through share (FTS) premium liabilities.

+ References

No definition available.

+ Details

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

- Definition

The amount of Flow-through share (FTS) premium liabilities incurred during the period.

+ References

No definition available.

+ Details

Name:	isou_FlowThroughSharePremiumLiabilitiesIncurred
Namespace Prefix:	isou_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The remaining amount of required Flow-through share (FTS) premium liability expenditures through end of commitment, as of balance sheet date.

+ References

No definition available.

+ Details

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

- Definition

The amount of settlement of Flow-through share (FTS) premium liabilities during the period.

+ References

No definition available.

+ Details

Name:	isou_FlowThroughSharePremiumLiabilitiesSettlement
Namespace Prefix:	isou_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Data Type:	na
Balance Type:
Period Type:

COMMITMENTS - Flow-through funding (Details) - CAD ($)			10 Months Ended	12 Months Ended		23 Months Ended
COMMITMENTS - Flow-through funding (Details) - CAD ($)	Feb. 28, 2025	Feb. 09, 2024	Dec. 31, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2025
Disclosure of financial liabilities [line items]
Flow-through share premium liability, beginning				$ 1,355,210
Liability incurred on flow-through shares issued				8,002,950	$ 3,680,000
Settlement of flow-through share liabilities on expenditures				(4,662,848)	(2,324,790)
Flow-through share premium liability, ending			$ 4,695,312	4,695,312	$ 1,355,210	$ 4,695,312
FTS Liability 2024 [Member]
Disclosure of financial liabilities [line items]
Liability incurred on flow-through shares issued		$ 23,000,000
Settlement of flow-through share liabilities on expenditures						23,000,000
FTS Liability 2025 [Member]
Disclosure of financial liabilities [line items]
Liability incurred on flow-through shares issued	$ 20,007,375
Settlement of flow-through share liabilities on expenditures			8,269,097
Remaining expenditure obligation			$ 11,738,278	$ 11,738,278		$ 11,738,278