Summary of Significant Accounting Policies (Details)
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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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Summary Of Significant Accounting Policies [Line Items] | ||
Potentially dilutive securities | 3,261,360us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | 3,525,904us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount |
Convertible Notes Principal [Member] | ||
Summary Of Significant Accounting Policies [Line Items] | ||
Potentially dilutive securities |
0us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = watt_ConvertibleNotesPrincipalMember |
2,650,858us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = watt_ConvertibleNotesPrincipalMember |
Convertible Notes Accrued Interest [Member] | ||
Summary Of Significant Accounting Policies [Line Items] | ||
Potentially dilutive securities |
0us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = watt_ConvertibleNotesAccruedInterestMember |
100,224us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = watt_ConvertibleNotesAccruedInterestMember |
Consulting Warrant [Member] | ||
Summary Of Significant Accounting Policies [Line Items] | ||
Potentially dilutive securities |
278,228us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = watt_ConsultingWarrantMember |
278,228us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = watt_ConsultingWarrantMember |
Financing Warrant [Member] | ||
Summary Of Significant Accounting Policies [Line Items] | ||
Potentially dilutive securities |
152,778us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = watt_FinancingWarrantMember |
220,905us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = watt_FinancingWarrantMember |
IPO Warrants [Member] | ||
Summary Of Significant Accounting Policies [Line Items] | ||
Potentially dilutive securities |
460,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = watt_InitialPublicOfferingWarrantMember |
0us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = watt_InitialPublicOfferingWarrantMember |
IR Consulting Warrant [Member] | ||
Summary Of Significant Accounting Policies [Line Items] | ||
Potentially dilutive securities |
36,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = watt_IrConsultingWarrantMember |
0us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = watt_IrConsultingWarrantMember |
Stock Option [Member] | ||
Summary Of Significant Accounting Policies [Line Items] | ||
Potentially dilutive securities |
1,607,075us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = us-gaap_StockOptionMember |
275,689us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = us-gaap_StockOptionMember |
Restricted Stock Units (RSUs) [Member] | ||
Summary Of Significant Accounting Policies [Line Items] | ||
Potentially dilutive securities |
727,279us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = us-gaap_RestrictedStockUnitsRSUMember |
0us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = us-gaap_RestrictedStockUnitsRSUMember |
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- Definition
Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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