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Commitments and Contingencies - Additional Information (Detail) - NUMBER	9 Months Ended
	Sep. 30, 2022	Aug. 02, 2021
Commitments and Contingencies Disclosure [Abstract]
Number of lease facilities		2
Percentage of federal and state net tax benefits for payment upon agreement	75.00%

X

- Definition

The percentage of federal and state net tax benefits for payment upon tax receivable agreement.

+ References

No definition available.

+ Details

Name:	evex_PercentageOfFederalAndStateNetTaxBenefitsForPaymentUponAgreement
Namespace Prefix:	evex_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of separate real estate development properties located on land subject to ground leases.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfPropertiesSubjectToGroundLeases
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant