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v3.21.4

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

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- Definition The amount of inventory impairment loss. + References No definition available. + Details
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Namespace Prefix: | mvst_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | srt_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract
Namespace Prefix: | srt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration