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Revenue Recognition - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Contract liabilities totalated	$ 0.0	$ 0.8

X

- Definition

Contract liabalities totalated.

+ References

No definition available.

+ Details

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Namespace Prefix:	mtus_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- References

No definition available.

+ Details

Name:	us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration