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Income Taxes (Details) (USD $)
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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| Deferred tax assets (liabilities): | |||
| Tax credit and net operating loss carryovers | $ 3,191,795watt_DeferredTaxAssetsTaxCreditAndNetOperatingLossCarryforwards | $ 900,830watt_DeferredTaxAssetsTaxCreditAndNetOperatingLossCarryforwards | |
| Property and equipment | (20,282)us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment | 0us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment | |
| Research and development costs | 5,820,399us-gaap_DeferredTaxAssetsInProcessResearchAndDevelopment | 845,900us-gaap_DeferredTaxAssetsInProcessResearchAndDevelopment | |
| Start-up and organizational costs | 1,443us-gaap_DeferredTaxAssetsOther | 1,554us-gaap_DeferredTaxAssetsOther | |
| Stock-based compensation | 448,893us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost | 647us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost | |
| Other accruals | 188,439us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther | 90,680us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther | |
| Total gross deferred tax assets | 9,630,687us-gaap_DeferredTaxAssetsGross | 1,839,611us-gaap_DeferredTaxAssetsGross | |
| Less: valuation allowance | (9,630,687)us-gaap_DeferredTaxAssetsValuationAllowance | (1,839,611)us-gaap_DeferredTaxAssetsValuationAllowance | (8,472)us-gaap_DeferredTaxAssetsValuationAllowance |
| Deferred tax assets, net | $ 0us-gaap_DeferredTaxAssetsNet | $ 0us-gaap_DeferredTaxAssetsNet |
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- Details
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from in-process research and development costs expensed in connection with a business combination. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences not separately disclosed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from property, plant, and equipment. No definition available.
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from other reserves and accruals not separately disclosed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The tax effect as of the balance sheet date of the amount of future tax deductions arising from all net operating loss carryforwards and unused tax credit carryforwards which have been reduced by a valuation allowance. No definition available.
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