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Namespace Prefix:	gevi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of general and administrative expense attributable to disposal group, including, but not limited to, discontinued operation.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Amount of operating expense attributable to disposal group, including, but not limited to, discontinued operation.

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Data Type:	xbrli:monetaryItemType
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Amount of operating income (loss) attributable to disposal group, including, but not limited to, discontinued operation.

Name:	us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of revenue attributable to disposal group, including, but not limited to, discontinued operation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5B
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 7
-URI https://asc.fasb.org/extlink&oid=109222650&loc=SL51721683-107760