XML 40 R40.htm IDEA: XBRL DOCUMENT
v2.4.0.8

(7) Equity Investment in Sunrise Energy (Details) | Dec. 31, 2013
--- | ---
Equity Investment In Sunrise Energy [Abstract] |
Equity Method Investment, Ownership Percentage | 50.00%
PercentageCondensedBalanceSheetSunriseEnergy | 100.00%

X
- Details
Name: | hnrg_EquityInvestmentInSunriseEnergyTextBlockAbstract
Namespace Prefix: | hnrg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Sunrise Energy's Financials Statements to the 100% + References No definition available. + Details
Name: | hnrg_PercentageCondensedBalanceSheetSunriseEnergy
Namespace Prefix: | hnrg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- 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