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Related Party Balances and Transactions (Details) - Schedule of Amount due From Related Party - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Amount due from related party: |  |  |
Ochem | [1] |  | $ 1,856
Total |  |  | $ 1,856
[1] | The balance represents advance payment for materials purchased from Ochem.

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- Definition Amount Due From Related Party. + References No definition available. + Details
Name: | mvst_AmountDueFromRelatedParty
Namespace Prefix: | mvst_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Due from related parties total amount. + References No definition available. + Details
Name: | mvst_DuefromrelatedpartiesTotal
Namespace Prefix: | mvst_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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