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Revenue Recognition - Schedule of Changes In the Contract Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Contract ​With​ Customer​ Liability
Contract liabilities, beginning of the period	$ 26,349	$ 6,610
Amounts in beginning balance recognized in revenue	(22,102)	(2,795)
Revenue recognized in current period	(86,190)	(6,956)
Advance payments received from customers	99,424	29,490
Contract liabilities, end of the period	$ 17,481	$ 26,349

X

- Definition

Contract With Customer Liability, Advance Payments Received From Customers

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	duration

X

- Definition

Contract With Customer, Liability, Revenue Recognized In Current Period

+ References

No definition available.

+ Details

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Namespace Prefix:	eose_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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X

- Definition

Contract ​With​ Customer​ Liability RollForward

+ References

No definition available.

+ Details

Name:	eose_ContractWithCustomerLiabilityRollForwardAbstract
Namespace Prefix:	eose_
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X

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-11

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479837/606-10-45-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-8

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479837/606-10-45-2

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Period Type:	instant

X

- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-8

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