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Income Taxes - Schedule of Reconciliation of Valuation Allowance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Valuation Allowance Roll Forward [Roll Forward]
Balance at beginning of period	$ 64,870	$ 51,904
Additions to valuation allowance	2,931	12,992
Reductions recorded from sale of business	(3,254)	(541)
Additions recorded as a decrease in equity	396	771
Reductions recorded as an increase in equity	(358)	(256)
Balance at end of period	$ 64,585	$ 64,870

X

- Definition

Valuation Allowance, Decrease As A Increase In Equity

+ References

No definition available.

+ Details

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Namespace Prefix:	evcm_
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Balance Type:	debit
Period Type:	duration

X

- Definition

Valuation Allowance, Increase As A Reduction in Equity

+ References

No definition available.

+ Details

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

- Definition

Valuation Allowance, Reductions Recorded From Of Sale Of Business

+ References

No definition available.

+ Details

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Namespace Prefix:	evcm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Valuation Allowance Roll Forward

+ References

No definition available.

+ Details

Name:	evcm_ValuationAllowanceRollForwardRollForward
Namespace Prefix:	evcm_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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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Namespace Prefix:	us-gaap_
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Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-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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