Annual report pursuant to Section 13 and 15(d)

Liquidity and Management Plans (Details Textual)

v2.4.1.9
Liquidity and Management Plans (Details Textual) (USD $)
1 Months Ended 3 Months Ended 12 Months Ended 1 Months Ended
Apr. 30, 2014
Dec. 31, 2014
Dec. 31, 2014
Dec. 31, 2013
Mar. 31, 2014
Dec. 31, 2012
Liquidity And Management Plans [Line Items]            
Net income (numerator for basic and diluted earnings per share)     $ (45,603,110)us-gaap_NetIncomeLoss $ (5,521,081)us-gaap_NetIncomeLoss    
Cash and Cash Equivalents, at Carrying Value, Total   31,494,592us-gaap_CashAndCashEquivalentsAtCarryingValue 31,494,592us-gaap_CashAndCashEquivalentsAtCarryingValue 1,953,780us-gaap_CashAndCashEquivalentsAtCarryingValue   994us-gaap_CashAndCashEquivalentsAtCarryingValue
Proceeds from Issuance of Common Stock 900,000us-gaap_ProceedsFromIssuanceOfCommonStock 21,000,000us-gaap_ProceedsFromIssuanceOfCommonStock 0us-gaap_ProceedsFromIssuanceOfCommonStock 200,681us-gaap_ProceedsFromIssuanceOfCommonStock    
Debt Conversion, Converted Instrument, Shares Issued     1,833,336us-gaap_DebtConversionConvertedInstrumentSharesIssued1 96,792us-gaap_DebtConversionConvertedInstrumentSharesIssued1    
Stock Issued During Period Shares Upon Conversion Of Debt Instrument Interest     96,792watt_StockIssuedDuringPeriodSharesUponConversionOfDebtInstrumentInterest      
Proceeds from Other Equity 700,000us-gaap_ProceedsFromOtherEquity   900,000us-gaap_ProceedsFromOtherEquity 0us-gaap_ProceedsFromOtherEquity    
Payments for Commissions 100,000us-gaap_PaymentsForCommissions   100,000us-gaap_PaymentsForCommissions      
Common Stock [Member]            
Liquidity And Management Plans [Line Items]            
Net income (numerator for basic and diluted earnings per share)     0us-gaap_NetIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
0us-gaap_NetIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
   
Stock Issued During Period, Shares, New Issues     4,600,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Stock Issued During Period, Shares, Issued for Services 210,527us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
  210,527us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
  210,527us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
 
Proceeds from Other Equity 700,000us-gaap_ProceedsFromOtherEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
      300,000us-gaap_ProceedsFromOtherEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
 
Development Stage Entities, Stock Issued, Shares, Issued for Noncash Consideration     41,563us-gaap_StockIssuedDuringPeriodSharesIssuedForNoncashConsideration
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Stock Issued During Period, Shares, Share-based Compensation, Gross     5,353us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Stock Issued During Period, Shares, Other     3,285,714us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
IPO [Member]            
Liquidity And Management Plans [Line Items]            
Stock Issued During Period, Shares, New Issues 4,600,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember
         
Proceeds from Issuance of Common Stock $ 24,800,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_IPOMember