The amount of outstanding funds that the entity is obligated to repay.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_55&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_Borrowings
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_112_c&doctype=Standard
-URIDate 2025-03-27

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

No definition available.

+ Details

Name:	shmd_IfrsDebtConversionOriginalDebtAmount
Namespace Prefix:	shmd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the total value of the entity's outstanding order backlog at the reporting date.

+ References

No definition available.

+ Details

Name:	shmd_OrderBacklogAmount
Namespace Prefix:	shmd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the total value of new customer orders received and accepted by the entity at the reporting period.

+ References

No definition available.

+ Details

Name:	shmd_OrderIntakeAmount
Namespace Prefix:	shmd_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=shmd_EnteringIntoDebtArrangementsMember
Namespace Prefix:
Data Type:	na
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Period Type:

- Details

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Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
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Period Type:

- Details

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EVENTS AFTER THE REPORTING PERIOD (Details) € in Millions, $ in Millions	Sep. 17, 2026 USD ($)	Aug. 21, 2026 EUR (€)	Jul. 14, 2026 USD ($)	Jun. 30, 2026 EUR (€)
Entering debt arrangements \| 2029 Convertible Note
EVENTS AFTER THE REPORTING PERIOD
Principal amount			$ 20.0
Conversion of debt instrument \| 2028 Convertible Note
EVENTS AFTER THE REPORTING PERIOD
Debt converted	$ 2.0
Debt outstanding	$ 9.0
Order intake and order backlog
EVENTS AFTER THE REPORTING PERIOD
Order intake \| €		€ 96.6		€ 44.3
Order backlog \| €		€ 95.0		€ 54.8