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Summary of Significant Accounting Policies - Product Warranties (Details)	12 Months Ended
	Dec. 31, 2023
Summary of Significant Accounting Policies
Product warranty term	1 year

X

- Definition

The warranty period given for products.

+ References

No definition available.

+ Details

Name:	msai_ProductWarrantyTerm
Namespace Prefix:	msai_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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