CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Revenues, net	$ 15,026,219us-gaap_SalesRevenueNet	$ 8,775,598us-gaap_SalesRevenueNet	$ 3,818,013us-gaap_SalesRevenueNet
Cost of goods sold	3,671,803us-gaap_CostOfGoodsSold	1,959,597us-gaap_CostOfGoodsSold	1,348,113us-gaap_CostOfGoodsSold
Gross profit	11,354,416us-gaap_GrossProfit	6,816,001us-gaap_GrossProfit	2,469,900us-gaap_GrossProfit
Operating expenses:
Sales, general, and administrative	22,124,072	19,014,837	14,069,701
Research and development	43,218,938us-gaap_ResearchAndDevelopmentExpense	13,551,263us-gaap_ResearchAndDevelopmentExpense	4,492,362us-gaap_ResearchAndDevelopmentExpense
Depreciation and amortization	52,467us-gaap_DepreciationAndAmortization	58,145us-gaap_DepreciationAndAmortization	56,260us-gaap_DepreciationAndAmortization
Total operating expense	65,395,477us-gaap_OperatingExpenses	32,624,245us-gaap_OperatingExpenses	18,618,323us-gaap_OperatingExpenses
Operating loss	(54,041,061)us-gaap_OperatingIncomeLoss	(25,808,244)us-gaap_OperatingIncomeLoss	(16,148,423)us-gaap_OperatingIncomeLoss
Other income and (expense)
Miscellaneous income	46,569us-gaap_OtherNonoperatingIncome	34,544us-gaap_OtherNonoperatingIncome	3,001us-gaap_OtherNonoperatingIncome
Interest income	37,309us-gaap_InvestmentIncomeInterest	27,234us-gaap_InvestmentIncomeInterest
Financing costs	(260,027)us-gaap_AmortizationOfFinancingCosts	(1,503,922)us-gaap_AmortizationOfFinancingCosts
Interest expense		(1,165,981)us-gaap_InterestExpenseDebt	(1,905,409)us-gaap_InterestExpenseDebt
Loan guaranty costs		(2,944)	(45,036)
Loss on extinguishment of debt			(10,307,864)
Beneficial conversion feature			(6,716,504)
Total other expense	(176,149)us-gaap_NonoperatingIncomeExpense	(2,611,069)us-gaap_NonoperatingIncomeExpense	(18,971,812)us-gaap_NonoperatingIncomeExpense
Loss before taxes	(54,217,210)	(28,419,313)	(35,120,235)
Provision for income taxes
Net loss	$ (54,217,210)us-gaap_NetIncomeLoss	$ (28,419,313)us-gaap_NetIncomeLoss	$ (35,120,235)us-gaap_NetIncomeLoss
Net loss per share, basic and diluted (in dollars per share)	$ (0.36)us-gaap_EarningsPerShareBasicAndDiluted	$ (0.22)us-gaap_EarningsPerShareBasicAndDiluted	$ (0.38)us-gaap_EarningsPerShareBasicAndDiluted
Weighted average number of shares outstanding (in shares)	149,727,228	127,569,731	91,630,693

Amount of noncash expense included in interest expense to issue debt and obtain financing associated with the related debt instruments. Alternate captions include noncash interest expense.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).

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