Aggregate Percentage On Proceeds From Sale Of Equity Interest

No definition available.

Name:	hnr_AggregatePercentageOnProceedsFromSaleOfEquityInterest
Namespace Prefix:	hnr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Aggregate Purchase Price Under Agreement Paid In Cash

+ References

No definition available.

+ Details

Name:	hnr_AggregatePurchasePriceUnderAgreementPaidInCash
Namespace Prefix:	hnr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Interest ownership percentage by parent.

+ References

No definition available.

+ Details

Name:	hnr_InterestOwnershipPercentageByParent
Namespace Prefix:	hnr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Interest ownership percentage in equity method investee by parent indirectly.

+ References

No definition available.

+ Details

Name:	hnr_InterestOwnershipPercentageInEquityMethodInvesteeByParentIndirectly
Namespace Prefix:	hnr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Interest ownership percentage in equity method investee by partner.

+ References

No definition available.

+ Details

Name:	hnr_InterestOwnershipPercentageInEquityMethodInvesteeByPartner
Namespace Prefix:	hnr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Interest ownership percentage in equity method investee by subsidiary indirectly.

+ References

No definition available.

+ Details

Name:	hnr_InterestOwnershipPercentageInEquityMethodInvesteeBySubsidiaryIndirectly
Namespace Prefix:	hnr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Interest ownership percentage in equity method investee partner by partner parent.

+ References

No definition available.

+ Details

Name:	hnr_InterestOwnershipPercentageInEquityMethodInvesteePartnerByPartnerParent
Namespace Prefix:	hnr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Closings For Sale Of Shares

+ References

No definition available.

+ Details

Name:	hnr_NumberOfClosingsForSaleOfShares
Namespace Prefix:	hnr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Interest ownership percentage in subsidiary by noncontrolling interest directly.

+ References

No definition available.

+ Details

Name:	hnr_OwnershipInterestPercentageByNoncontrollingInterest
Namespace Prefix:	hnr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Sale Of Equity Interest

+ References

No definition available.

+ Details

Name:	hnr_SaleOfEquityInterest
Namespace Prefix:	hnr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

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

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Gain (loss) included in earnings resulting from the sale of interest in projects.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2941-110230

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760

+ Details

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

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Organization - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	0 Months Ended	12 Months Ended	0 Months Ended	12 Months Ended							0 Months Ended		0 Months Ended	12 Months Ended				0 Months Ended	12 Months Ended
	Dec. 16, 2013 Closings	Dec. 31, 2013	Dec. 16, 2013 Petrodelta, S.A. [Member]	Dec. 31, 2013 Petrodelta, S.A. [Member]	Dec. 31, 2012 Petrodelta, S.A. [Member]	Dec. 31, 2011 Petrodelta, S.A. [Member]	Dec. 31, 2013 Petrodelta, S.A. [Member] Corporacion Venezolana del Petroleo S.A. [Member]	Dec. 31, 2013 Petrodelta, S.A. [Member] PDVSA Social S.A. [Member]	Dec. 31, 2013 Petroleos de Venezuela S.A. [Member] CVP and PDVSA Social S.A. [Member]	Dec. 31, 2013 Harvest Vinccler S.C.A. [Member]	Dec. 16, 2013 Harvest Holding [Member]	Dec. 31, 2013 Harvest Holding [Member] Closings	Dec. 31, 2013 Harvest Holding [Member] Petrodelta, S.A. [Member]	Dec. 16, 2013 Harvest Holding [Member] Petrodelta, S.A. [Member]	Dec. 31, 2013 Harvest Holding [Member] Petrodelta, S.A. [Member]	Dec. 16, 2013 Harvest Holding [Member] Harvest Vinccler S.C.A. [Member]	Dec. 16, 2013 Harvest Holding [Member] Petroandina [Member]	Dec. 16, 2013 Oil & Gas Technology Consultants [Member] Closings	Dec. 31, 2013 Oil & Gas Technology Consultants [Member]	Dec. 16, 2013 Oil & Gas Technology Consultants [Member] Harvest Vinccler S.C.A. [Member]	Dec. 16, 2013 Oil & Gas Technology Consultants [Member] Petroandina [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Interest indirectly owned in Harvest Holding											80.00%				80.00%			80.00%	51.00%
Interest indirectly owned by Oil & Gas Technology Consultants in Harvest Holding																		20.00%
Aggregate cash purchase price	$ 400																	$ 400
Interest held in Petrodelta by Harvest Holding				40.00%											40.00%			80.00%
Number of closings of Equity interest	2											2						2
Sale of equity interest in Harvest Holding on first closing																		29.00%
Cost of Sale of Equity interest																		125
Loss on Sale of Interest in Harvest holding																			$ 23.0
Percentage hold by non controlling interest											49.00%					20.00%	29.00%	49.00%		20.00%	29.00%
Partner interest in equity method investee			60.00%				56.00%	4.00%
Percentage of interest owned by PDVSA in CVP									100.00%
Indirect interest held in Petrodelta by HNR		20.40%			32.00%	32.00%							20.40%	32.00%	51.00%
Equity ownership percentage										100.00%	80.00%