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v3.21.2

Related party balances and transactions (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2019
Related party balances and transactions (Details) [Line Items] |  |  |  |  |  |
Loans from related parties, accumulative amount |  |  | $ 8,426 | $ 10,456 |  |
Outstanding balance due from related party |  |  |  |  |  |
Ochemate [Member] |  |  |  |  |  |
Related party balances and transactions (Details) [Line Items] |  |  |  |  |  |
Loans from related parties, accumulative amount |  |  |  |  | 18,889 | 15,142
ochem [member] |  |  |  |  |  |
Related party balances and transactions (Details) [Line Items] |  |  |  |  |  |
Loans from related parties, accumulative amount | $ 4,184 | $ 4,531 |  |  |  |
ochem [member] |  |  |  |  |  |
Related party balances and transactions (Details) [Line Items] |  |  |  |  |  |
Loans from related parties, accumulative amount |  |  |  |  | $ 18,889 | $ 15,142

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

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

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- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=thcb_OchemateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=thcb_OchemMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=thcb_OchemMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |