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RELATED PARTY BALANCES AND TRANSACTIONS - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Related Party Transactions [Abstract] |  |  |
Loans from related parties, accumulative amount | $ 0 | $ 8,426 | $ 18,889
Outstanding balance due from related party |  | $ 85 |

X
- Definition Accumulated amount of interest-free loans from related parties. + References No definition available. + Details
Name: | mvst_LoansFromRelatedParties
Namespace Prefix: | mvst_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Receivables to be collected from (obligations owed to) related parties, net as of the balance sheet date where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. + References No definition available. + Details
Name: | mvst_OutstandingBalanceDueFromRelatedParty
Namespace Prefix: | mvst_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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