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Reclassification of the Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Condensed Financial Information Disclosure [Abstract]
Inventory impairment	$ 1,343	$ 4,233	$ 13,622

X

- Definition

The amount of inventory impairment loss.

+ References

No definition available.

+ Details

Name:	mvst_InventoryImpairmentLoss
Namespace Prefix:	mvst_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	srt_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract
Namespace Prefix:	srt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration