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Summary of Significant Accounting Policies - Inventory (Details)	Mar. 31, 2024	Dec. 31, 2023
Summary of Significant Accounting Policies
Percentage of coverage count on a quarterly basis considered for inventory evaluation	80.00%	80.00%

X

- Definition

The percentage of coverage count on a quarterly basis considered for inventory evaluation.

+ References

No definition available.

+ Details

Name:	msai_PercentageOfCoverageCountOnQuarterlyBasisConsideredForInventoryEvaluation
Namespace Prefix:	msai_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

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