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v3.26.1

Summary of significant accounting policies (Details Narrative) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2025 | Dec. 31, 2024
IfrsStatementLineItems [Line Items] |  |
Deferred IPO costs |  | $ 1,623,627
Accumulated deferred IPO costs | $ 2,023,807 |
Computer software [member] | Bottom of range [member] |  |
IfrsStatementLineItems [Line Items] |  |
Eestimated useful life | 3 years |
Computer software [member] | Top of range [member] |  |
IfrsStatementLineItems [Line Items] |  |
Eestimated useful life | 5 years |

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- Definition Accumulated deferred initial public offering costs. + References No definition available. + Details
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Namespace Prefix: | YMAT_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Deferred initial public offering cost. + References No definition available. + Details
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Namespace Prefix: | YMAT_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | YMAT_
Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition The useful life, measured as period of time, used for intangible assets other than goodwill. [Refer: Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2024-01-01 -Paragraph 118 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_118_a&doctype=Standard -URIDate 2024-03-27 + Details
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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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