Share based compensation arrangement award payment accrual for future awards amount.

No definition available.

Name:	muln_ShareBasedCompensationArrangementAwardPaymentAccrualForFutureAwardsAmount
Namespace Prefix:	muln_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage of awards to be issued under share-based payment arrangement.

+ References

No definition available.

+ Details

Name:	muln_SharebasedCompensationArrangementBySharebasedPaymentAwardPercentOfSharesToBeIssued
Namespace Prefix:	muln_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the income (cost) recognition attributable to performance revaluation of a performance based share-based compensation arrangement.

+ References

No definition available.

+ Details

Name:	muln_SharebasedCompensationArrangementBySharebasedPaymentAwardPerformanceAwardRevaluationIncomeCostRecognition
Namespace Prefix:	muln_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of expenses incurred but not yet paid nor invoiced, and liabilities classified as other.

+ References

No definition available.

+ Details

Name:	us-gaap_AccruedLiabilitiesAndOtherLiabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479983/718-10-S45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479830/718-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Aggregate number of common shares reserved for future issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-4

+ Details

Name:	us-gaap_DeferredCompensationSharebasedArrangementsLiabilityCurrentAndNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Sum of the carrying amounts as of the balance sheet date of amounts paid in advance for expenses which will be charged against earnings in periods after one year or beyond the operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(17))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_PrepaidExpenseNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_ResearchAndDevelopmentExpenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_GranteeStatusAxis=us-gaap_ShareBasedPaymentArrangementEmployeeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_GranteeStatusAxis=muln_ShareBasedPaymentArrangementConsultantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=muln_CeoAwardIncentivePlansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_TitleOfIndividualAxis=muln_EmployeesAndConsultantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=muln_EquityIncentivesPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_TitleOfIndividualAxis=srt_ChiefExecutiveOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 11 - Share-based Compensation (Details Textual) - USD ($) shares in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024	Sep. 30, 2024
Deferred Compensation Share-Based Arrangements, Liability, Current and Noncurrent	$ 133,684		$ 133,684		$ 356,206
Share-Based Payment Arrangement, Expense	23,680,269	$ 1,705,859	42,272,019	$ 15,609,276
Research and Development Expense [Member]
Share-Based Payment Arrangement, Expense	2,500,000		3,100,000
Share-Based Payment Arrangement, Employee [Member]
Accrued Liabilities and Other Liabilities	200,000		200,000
Deferred Compensation Share-Based Arrangements, Liability, Current and Noncurrent	200,000		200,000
Share Based Payment Arrangement, Consultants [Member]
Deferred Compensation Share-Based Arrangements, Liability, Current and Noncurrent	300,000		300,000
Prepaid Expense, Noncurrent	$ 2,800,000		2,800,000
CEO Award Incentive Plans [Member]
Share Based Compensation Arrangement Award Payment Accrual for Future Awards Amount			$ 800
Employees and Consultants [Member] \| Equity Incentives Plan [Member] \| Common Stock [Member]
Common Stock, Capital Shares Reserved for Future Issuance (in shares)	19		19
Chief Executive Officer [Member]
Share-Based Payment Arrangement, Expense	$ (1,205,545)	$ (6,240,510)	$ (543,454)	$ (6,065,658)
Chief Executive Officer [Member] \| CEO Award Incentive Plans [Member]
Share-Based Compensation Arrangement By Share-Based Payment Award, Performance Award Revaluation, Income (Cost) Recognition	$ 200,000		$ 200,000
Chief Executive Officer [Member] \| CEO Award Incentive Plans [Member] \| Minimum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Percent of Shares to be Issued			1.00%
Chief Executive Officer [Member] \| CEO Award Incentive Plans [Member] \| Maximum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Percent of Shares to be Issued			3.00%