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Accounts Receivable (Details) - Schedule of allowance for doubtful accounts - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Schedule of allowance for doubtful accounts [Abstract] |  |  |  |  |
Balance at beginning of the period | $ 5,005 | $ 5,047 | $ 5,047 | $ 5,537 | $ 10,111
(Reserve)/Charge to expenses |  |  | 721 | (240) | (4,250)
Write off |  | 103 | (849) | (493) | (233)
Exchange difference | 28 | (14) | 86 | 243 | (91)
Balance at end of the period | $ 5,354 | $ 4,416 | $ 5,005 | $ 5,047 | $ 5,537

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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 https://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