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Subsequent Events - Additional Information (Detail) (USD $) | 0 Months Ended | 12 Months Ended | 0 Months Ended
--- | --- | --- | ---
Jan. 01, 2013 | Dec. 31, 2012 | Jan. 03, 2013 Subsequent Event Stock Options Employees [Member]
Subsequent Event [Line Items] |  |  |
Stock Issued During Period, Shares, Share-based Compensation, Gross |  |  | 35,000
Warrant Issued To Purchase Common Stock | 300,000 |  |
Investment Warrants, Exercise Price | $ 0.70 |  |
Stock Issued During Period, Value, Issued for Services |  | $ 130,000 |

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- Definition Warrant issued to purchase common stock during period + References No definition available. + Details
Name: | enrj_WarrantIssuedToPurchaseCommonStock
Namespace Prefix: | enrj_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Exercise price of the warrants. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column A + Details
Name: | invest_InvestmentWarrantsExercisePrice
Namespace Prefix: | invest_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

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- Definition Gross number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans. + References No definition available. + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Value of stock issued in lieu of cash for services contributed to the entity. Value of the stock issued includes, but is not limited to, services contributed by vendors and founders. + References No definition available. + Details
Name: | us-gaap_StockIssuedDuringPeriodValueIssuedForServices
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration