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Significant Accounting Policies (Details) - Schedule of accounts receivable from customers | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Percentage of accounts receivable from Customer B | 10.00% |
Percentage of accounts receivable from Customer B [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Percentage of accounts receivable from Customer B | 10.00% |

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- Definition Percentage of accounts receivable from Customer. + References No definition available. + Details
Name: | mvst_PercentageOfAccountsReceivableFromCustomer
Namespace Prefix: | mvst_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_AwardTypeAxis=mvst_PercentageOfAccountsReceivableFromCustomerBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |