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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
Sep. 30, 2014
Dec. 31, 2013
Statement of Financial Position [Abstract]    
Amortization of deferred financing costs $ 337,054teng_AmortizationOfDeferredFinancingCost $ 1,308,817teng_AmortizationOfDeferredFinancingCost
Accumulated depreciation on property and equipment $ 344,518us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment $ 317,704us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Preferred stock, par value $ 0.001us-gaap_PreferredStockParOrStatedValuePerShare $ 0.001us-gaap_PreferredStockParOrStatedValuePerShare
Preferred stock, shares authorized 10,000,000us-gaap_PreferredStockSharesAuthorized 10,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued
Preferred stock, shares outstanding 0us-gaap_PreferredStockSharesOutstanding 0us-gaap_PreferredStockSharesOutstanding
Common stock, par value $ 0.001us-gaap_CommonStockParOrStatedValuePerShare $ 0.001us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized 500,000,000us-gaap_CommonStockSharesAuthorized 500,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued 14,406,260us-gaap_CommonStockSharesIssued 13,457,978us-gaap_CommonStockSharesIssued
Common stock, shares outstanding 14,404,260us-gaap_CommonStockSharesOutstanding 13,455,978us-gaap_CommonStockSharesOutstanding
Treasury stock, shares 2,000us-gaap_TreasuryStockShares 2,000us-gaap_TreasuryStockShares