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Earnout Liability - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 3 Months Ended |
--- | --- | --- | --- | ---
Jul. 02, 2021 | Jul. 01, 2021 | Mar. 31, 2022 | Dec. 31, 2021
Earnout shares related to business combination |  | 1,437,500 |  |
Change in fair value of earnout liability |  |  | $ (2,264) |
Earnout liability, at fair value |  | $ 18,300 | $ 7,475 | $ 5,211
$12.50 Triggering Event [[Member] |  |  |  |
Earnout shares related to business combination | 718,750 |  |  |
Earnout triggering share price | $ 12.50 |  |  |
Earnout liability, at fair value | $ 10,900 |  |  |
$15.00 Triggering Event |  |  |  |
Earnout shares related to business combination | 718,750 |  |  |
Earnout triggering share price | $ 15.00 |  | $ 15.00 |
Change in fair value of earnout liability |  |  | $ 2,300 |
Earnout liability, at fair value | $ 8,800 |  | $ 7,500 | $ 5,200

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- Definition Earnout shares related to business combination. + References No definition available. + Details
Name: | evgo_EarnoutSharesRelatedToBusinessCombination
Namespace Prefix: | evgo_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Earnout triggering share price. + References No definition available. + Details
Name: | evgo_EarnoutTriggeringSharePrice
Namespace Prefix: | evgo_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of expense (income) related to adjustment to fair value of earnout liability. + References No definition available. + Details
Name: | evgo_FairValueAdjustmentOfEarnoutLiability
Namespace Prefix: | evgo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled beyond one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 35 -Paragraph 1 -Subparagraph b -URI http://asc.fasb.org/extlink&oid=116859824&loc=d3e6819-128478 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
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Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |