XML 59 R37.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Liquidity (Details) | 12 Months Ended
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Dec. 31, 2017 item
Minimum [Member] |
Liquidity And Going Concern [Line Items] |
Number of planned wells to be drilled in the next twelve months | 2
Maximum [Member] |
Liquidity And Going Concern [Line Items] |
Number of planned wells to be drilled in the next twelve months | 3

X
- Definition Liquidity And Going Concern [Line Items] + References No definition available. + Details
Name: | egy_LiquidityAndGoingConcernLineItems
Namespace Prefix: | egy_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Planned Wells To Be Drilled In the Next Twelve Months + References No definition available. + Details
Name: | egy_NumberOfPlannedWellsToBeDrilledInNextTwelveMonths
Namespace Prefix: | egy_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |