v3.26.3
Schedule of loss rate methodology (Details) - USD ($)
Jun. 30, 2026
Dec. 31, 2025
IfrsStatementLineItems [Line Items]
Expected loss rate
Total book value
$ 5,761,466
$ 3,578,974
Expected credit loss
$ 331,761
$ 331,761
Current [member]
IfrsStatementLineItems [Line Items]
Expected loss rate
0.00%
0.01%
Total book value
$ 984,881
$ 1,764,589
Expected credit loss
$ 122
Later than one month and not later than two months [member]
IfrsStatementLineItems [Line Items]
Expected loss rate
0.00%
0.08%
Total book value
$ 937,852
$ 249,410
Expected credit loss
$ 203
Later than two months and not later than three months [member]
IfrsStatementLineItems [Line Items]
Expected loss rate
0.77%
14.20%
Total book value
$ 69,160
$ 1,558,011
Expected credit loss
$ 534
$ 257,810
Later than three months [member]
IfrsStatementLineItems [Line Items]
Expected loss rate
1.06%
92.93%
Total book value
$ 603,510
$ 5,499
Expected credit loss
$ 6,404
$ 72,269
Over Than Three Months [member]
IfrsStatementLineItems [Line Items]
Expected loss rate
10.25%
92.63%
Total book value
$ 3,166,063
$ 1,465
Expected credit loss
$ 324,823
$ 1,357
X
- Definition
Accounts receivables.
+ References
No definition available.
+ Details
Name:
YMAT_AccountsReceivables
Namespace Prefix:
YMAT_
Data Type:
xbrli:monetaryItemType
Balance Type:
debit
Period Type:
instant
X
- Definition
Credit loss for allowance
+ References
No definition available.
+ Details
Name:
YMAT_CreditLossForAllowance
Namespace Prefix:
YMAT_
Data Type:
xbrli:monetaryItemType
Balance Type:
credit
Period Type:
instant
X
- Definition
Expected loss rate
+ References
No definition available.
+ Details
Name:
YMAT_ExpectedLossRate
Namespace Prefix:
YMAT_
Data Type:
dtr-types:percentItemType
Balance Type:
na
Period Type:
instant
X
- References
No definition available.
+ Details
Name:
YMAT_IfrsStatementLineItems
Namespace Prefix:
YMAT_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
duration
X
- Details
Name:
ifrs-full_PastDueStatusAxis=ifrs-full_CurrentMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type:
X
- Details
Name:
ifrs-full_PastDueStatusAxis=ifrs-full_LaterThanOneMonthAndNotLaterThanTwoMonthsMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type:
X
- Details
Name:
ifrs-full_PastDueStatusAxis=ifrs-full_LaterThanTwoMonthsAndNotLaterThanThreeMonthsMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type:
X
- Details
Name:
ifrs-full_PastDueStatusAxis=ifrs-full_LaterThanThreeMonthsMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type:
X
- Details
Name:
ifrs-full_PastDueStatusAxis=YMAT_OverThanThreeMonthsMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type: