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Income Taxes (Details 2)
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12 Months Ended | |
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Dec. 31, 2014
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Dec. 31, 2013
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| Income Tax Contingency [Line Items] | ||
| Tax benefit at federal statutory rate | (34.00%)us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | (34.00%)us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate |
| State income taxes | (5.80%)us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes | (5.80%)us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes |
| Permanent difference: | ||
| Stock-based compensation | 1.10%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost | 0.10%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost |
| Change in fair value of derivative liability | 22.90%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments | 1.30%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments |
| Amortization of debt discount | 0.80%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseAmortization | 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseAmortization |
| Gain on debt extinguishment | (1.80%)watt_EffectiveIncomeTaxRateReconciliationGainLossOnExtinguishmentOfDebt | 0.00%watt_EffectiveIncomeTaxRateReconciliationGainLossOnExtinguishmentOfDebt |
| Other | 0.60%us-gaap_EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent | 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent |
| Federal research and development tax credit | (0.90%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch | 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch |
| Increase in valuation allowance | 17.10%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance | 33.20%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance |
| Effective income tax rate | 0.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 0.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations |
| Consulting Warrant [Member] | ||
| Permanent difference: | ||
| General and administrative expense - consulting warrant |
0.00%us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsOther / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = watt_ConsultingWarrantMember |
3.90%us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsOther / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = watt_ConsultingWarrantMember |
| Financing Warrant [Member] | ||
| Permanent difference: | ||
| Derivative instrument issuance - financing warrant |
0.00%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = watt_FinancingWarrantMember |
1.30%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = watt_FinancingWarrantMember |
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- Definition
Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other deductions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to amortization. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other nondeductible expenses. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to equity-based compensation costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of the difference, between reported income tax expense (benefit) and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, that is attributable to tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority interest income (expense), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, change in enacted tax rate, prior year income taxes, change in deferred tax asset valuation allowance, and other adjustments. No definition available.
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to research tax credit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable togain or loss on extinguishment of debt for the reporting period. No definition available.
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- Details
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- Details
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