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v3.22.2.2

Other Current Assets - Schedule Of Other Current Assets (Parenthetical) (Detail) | 12 Months Ended
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Dec. 31, 2021 Officers
Other Current Asset [Abstract] |
Number of officers under insurance contract | 2

X
- Definition Number of officers under insurance contract + References No definition available. + Details
Name: | evex_Numberofofficersunderinsurancecontract
Namespace Prefix: | evex_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Other current asset. + References No definition available. + Details
Name: | evex_OtherCurrentAssetAbstract
Namespace Prefix: | evex_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration