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SUBSEQUENT EVENTS - Common stock purchase (Details) - Esousa Holdings, LLC | Sep. 01, 2021 USD ($)
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Subsequent Event [Line Items] |
Aggregate commitment amount to purchase common shares | $ 30,000,000
Percentage Of 2,500,000 Used To Calculate Number Of Shares | 125.00%
Value By Which 125% Is Multiplied To Calculate Number Of Shares | $ 2,500,000

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- Definition Represents the aggregate commitment amount to purchase common shares. + References No definition available. + Details
Name: | muln_CommitmentToPurchaseCommonShares
Namespace Prefix: | muln_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Represents the percentage of 2,500,000 used to calculate number of shares. + References No definition available. + Details
Name: | muln_PercentageOf2500000UsedToCalculateNumberOfShares
Namespace Prefix: | muln_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the value by which 125% is multiplied to calculate number of shares. + References No definition available. + Details
Name: | muln_ValueByWhich125IsMultipliedToCalculateNumberOfShares
Namespace Prefix: | muln_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_CounterpartyNameAxis=muln_EsousaHoldingsLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |