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Stock Based Compensation (Details 3) (USD $)
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3 Months Ended | |
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Mar. 31, 2015
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Mar. 31, 2014
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| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||
| Share-based Compensation, Total | $ 1,679,221us-gaap_ShareBasedCompensation | $ 492,123us-gaap_ShareBasedCompensation |
| Restricted Stock [Member] | ||
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||
| Allocated Share-based Compensation Expense |
1,333,875us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |
0us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |
| IR Consulting Warrant [Member] | ||
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||
| Allocated Share-based Compensation Expense |
85,831us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = watt_IrConsultingWarrantMember |
61,028us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = watt_IrConsultingWarrantMember |
| Employee Stock Option [Member] | ||
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||
| Allocated Share-based Compensation Expense |
$ 259,515us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_OptionIndexedToIssuersEquityEquityAxis = us-gaap_EmployeeStockOptionMember |
$ 431,095us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_OptionIndexedToIssuersEquityEquityAxis = us-gaap_EmployeeStockOptionMember |
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- Definition
Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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