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Summary of Significant Accounting Policies - Warrants (Details) - shares	Dec. 19, 2023	Dec. 31, 2023
Class of Warrant or Right [Line Items]
Warrants outstanding		9,131,250
Warrants issued in connection with business combination	340,250
Public Warrants | Initial Public Offering
Class of Warrant or Right [Line Items]
Warrants outstanding		8,625,000
Private Placement Warrants | Initial Public Offering
Class of Warrant or Right [Line Items]
Warrants outstanding		506,250

X

- Definition

Number of warrants issued in connection with business combination.

+ References

No definition available.

+ Details

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Namespace Prefix:	msai_
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Balance Type:	na
Period Type:	duration

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.

+ Details

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

X

- Definition

Number of warrants or rights outstanding.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Period Type:	instant

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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

X

- Details

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