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Accounts Receivable (Details) - Schedule of allowance for doubtful accounts - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Schedule of allowance for doubtful accounts [Abstract] |  |  |  |
Balance at beginning of the period | $ 4,743 | $ 4,534 | $ 5,047 | $ 5,537
Charge to expenses | 457 | 2 | 261 | (861)
Write off | (415) |  | (546) |
Exchange difference | 11 | 173 | 34 | 33
Balance at end of the period | $ 4,796 | $ 4,709 | $ 4,796 | $ 4,709

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- Definition Accounts receivable Write off. + References No definition available. + Details
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Namespace Prefix: | mvst_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | mvst_AllowanceForDoubtfulAccountReceivable
Namespace Prefix: | mvst_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Charge to expenses. + References No definition available. + Details
Name: | mvst_ChargeToExpenses
Namespace Prefix: | mvst_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

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

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- Definition Amount of increase (decrease) in allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration