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PREPAID EXPENSES (Details Narrative)	Nov. 30, 2024 CAD ($)
PREPAID EXPENSES
First installment of prepaid expenses	$ 750,000

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Namespace Prefix:	karx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration