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Schedule of cost of inventories (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Notes and other explanatory information [abstract]
Cost of goods sold	$ 11,921,857	$ 20,893,411
Loss on (reversal of) inventory valuation	11,324	(37,569)
Cost of inventories	$ 11,933,181	$ 20,855,842

X

- Definition

Reversal of loss on inventory writedown.

+ References

No definition available.

+ Details

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Namespace Prefix:	YMAT_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of inventories recognised as an expense during the period. [Refer: Inventories]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 2
-IssueDate 2024-01-01
-Paragraph 36
-Subparagraph d
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-URIDate 2024-03-27

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X

- Definition

The amount of merchandise that was sold during the period and recognised as an expense.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 85
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_85&doctype=Standard
-URIDate 2024-03-27

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Period Type:	duration

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- References

No definition available.

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