Related Party Balances and Transactions (Details) - USD ($)	3 Months Ended	12 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Related Party Transactions [Abstract]
Interest-free loans from related parties accumulative amounts	$ 0	$ 1,874,000	$ 8,426,000	$ 18,889,000	$ 15,142,000
Outstanding due from ochem	$ 0		$ 85,000

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.

No definition available.

Name:	mvst_OutstandingBalanceDueFromRelatedParty
Namespace Prefix:	mvst_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant