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Note 15 - Income Taxes - Schedule of Deferred Tax Assets (Details) - EUR (€) € in Thousands	Dec. 31, 2024	Dec. 31, 2023
NOL DTA	€ 106,429	€ 103,436
(Gain) From Change in FV of Convertible Debt	(242)	(242)
Unrecognized tax losses	1,274	1,274
Permanent differences	0	0
Tax deductible transaction cost	0	114
CSOP non tax deductible expenses	0	179
RSU supervisory board	0	(34)
ESOP non tax deductible expenses	0	(108)
Non tax deductible expenses	0	8
Net Deferred Tax Asset	107,461	104,627
Less valuation allowance	(107,461)	(104,627)
Deferred Tax Assets	€ 0	€ 0

X

- Definition

Amount of deferred tax asset (liability) attributable to taxable temporary differences before valuation allowance.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of deferred tax asset attributable to permanent differences.

+ References

No definition available.

+ Details

Name:	sev_DeferredTaxAssetsPermanentDifferences
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X

- Definition

Amount of deferred tax asset attributable to transaction costs.

+ References

No definition available.

+ Details

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Balance Type:	debit
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X

- Definition

Amount of deferred tax asset attributable to unrecognized tax losses.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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X

- Definition

Amount of deferred tax liability attributable to taxable temporary differences from changes in fair value of convertible debt.

+ References

No definition available.

+ Details

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X

- Definition

Amount of deferred tax liability attributable to taxable temporary differences from employee stock ownership plan

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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X

- Definition

Amount of deferred tax liability attributable to taxable temporary differences from restricted stock units.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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X

- Definition

Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

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X

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-6

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X

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from compensation and benefits costs.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-6

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X

- Definition

Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences from provisions, reserves, allowances, and accruals, classified as other.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-6

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X

- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

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