MATERIAL ACCOUNTING POLICIES - Assets held for sale and discontinued operations (Details)	12 Months Ended
Dec. 31, 2025 CAD ($)
MATERIAL ACCOUNTING POLICIES
Depreciation charged on assets and businesses classified as held for sale	$ 0

The amount of depreciation charged on assets and businesses classified as held for sale.

No definition available.

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