Derivative Liabilities - Additional Information (Detail) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Derivative [Line Items]
Volatility	35.00%
Stock issued in exchange for warrants tendered	$ 19,100,000
Fair value of common shares issued in excess of fair value of warrants tendered	883,422us-gaap_FairValueAdjustmentOfWarrants	0us-gaap_FairValueAdjustmentOfWarrants
Fair Value Assumptions, Expected Dividend Rate	0.00%
Issuances date
Derivative [Line Items]
Derivative liability at fair value	1,984,000
10% Convertible Redeemable Preferred Stock
Derivative [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	58,352
Expected life	1 year 7 months 6 days
Volatility	85.00%
Risk-free interest rate	0.47%
Convertible preferred stock per share	$ 10
Fair Value Assumptions, Expected Dividend Rate	0.00%
12% Convertible Promissory Notes
Derivative [Line Items]
Derivative liability at fair value	69,000
Increase decrease in fair value of un hedged derivative instruments	88,000
Conversion Options
Derivative [Line Items]
Derivative liability at fair value	6,332,400
Increase decrease in fair value of un hedged derivative instruments	14,803,100	10,870,400
Conversion Options \| Issuances date
Derivative [Line Items]
Derivative liability at fair value	157,000
Warrant
Derivative [Line Items]
Increase decrease in fair value of un hedged derivative instruments	5,181,400	4,235,900
Warrant \| Placement Agent
Derivative [Line Items]
Warrants Not Settleable in Cash, Fair Value Disclosure	52,700	296,200
Change in fair value of warrant liability	243,500	214,500
Warrant \| Issuances date \| Derivative
Derivative [Line Items]
Derivative liability at fair value	$ 1,168,700
Maximum
Derivative [Line Items]
Expected life	7 months 24 days
Risk-free interest rate	0.14%

Change In Fair Value Of Warrant Liability.

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Stock issued in exchange for warrants tendered.

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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

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Amount of expense (income) related to adjustment to fair value of warrant liability.

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Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price).

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Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

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Risk-free interest rate assumption used in valuing an instrument.

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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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Fair value portion of warrants not settleable in cash classified as equity.

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