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Income Taxes (Details) - Schedule of reconciliation between the income tax expense - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of reconciliation between the income tax expense [Abstract]
Loss before income tax	$ (33,624)	$ (59,474)	$ (54,266)
Tax credit at the U.S. federal corporate income tax rate of 21%	(7,061)	(12,490)	(11,396)
Tax effect of permanent differences	(2,152)	(2,961)	(4,033)
Tax effect of income tax rate difference in other jurisdictions	2,511	4,076	3,417
Changes in valuation allowance	6,702	11,669	17,943
Others	1	(105)	494
Income tax expense	$ 1	$ 189	$ 6,425

X

- Definition

Income tax expense

+ References

No definition available.

+ Details

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X

- Definition

Tax effect of income tax rate difference in other jurisdictions.

+ References

No definition available.

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- Definition

Income tax reconciliation in permanent differences.

+ References

No definition available.

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- References

No definition available.

+ Details

Name:	mvst_LossBeforeIncomesTaxes
Namespace Prefix:	mvst_
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Balance Type:	credit
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- References

No definition available.

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- Definition

Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319

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- Definition

The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319

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- Definition

Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319

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