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FAIR VALUE OF FINANCIAL INSTRUMENTS (Details Narrative) - CAD ($) | Sep. 30, 2025 | Dec. 31, 2024
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Cymbria [Member] | NSR Option Liability [Member] |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |
Fair value of call option |  |

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- Definition Fair value of call option. + References No definition available. + Details
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Namespace Prefix: | NEXM_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 808 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479402/808-10-50-1 + Details
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Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |