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Share-based payment plans - Share-based payment plans of RapidFit narrative (Details) - EUR (€) € / shares in Units, € in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Share-based payment plans
Share-based payment expense	€ 266	€ 285	€ 47
Rapidfit+ plan
Share-based payment plans
Maximum number of warrants	300
Share-based payment expense	€ 0	€ 0	€ 0
Exercise price, share options granted	€ 553.9

X

- Definition

The exercise price of share options granted.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2025-01-01
-Paragraph 47
-Subparagraph a
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-URIDate 2025-03-27

+ Details

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X

- References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2025-en-r&anchor=para_51_a&doctype=Standard
-URIDate 2025-03-27

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X

- 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

No definition available.

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X

- Definition

Represents maximum number of warrants.

+ References

No definition available.

+ Details

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Namespace Prefix:	mtls_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Details

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