Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Convertible preferred stock - shares authorized	2,000,000us-gaap_PreferredStockSharesAuthorized	2,000,000us-gaap_PreferredStockSharesAuthorized
Common stock par value	$ 0.01	$ 0.01
Common stock, shares authorized	250,000,000us-gaap_CommonStockSharesAuthorized	250,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	54,563,662us-gaap_CommonStockSharesIssued	53,691,043us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	54,563,662us-gaap_CommonStockSharesOutstanding	53,691,043us-gaap_CommonStockSharesOutstanding
Treasury stock shares	100,000us-gaap_TreasuryStockShares	100,000us-gaap_TreasuryStockShares
Preferred Class A
Convertible preferred stock - par value	$ 0.01	$ 0.01
Convertible preferred stock - shares authorized	150,000	150,000
Convertible preferred stock - shares issued	138,217	132,582
Convertible preferred stock - shares outstanding	138,217	132,582
Convertible preferred stock - liquidation preference	$ 3,593,642
Preferred Class B
Convertible preferred stock - par value	$ 0.01	$ 0.01
Convertible preferred stock - shares authorized	125,000	125,000
Convertible preferred stock - shares issued	104,757	100,486
Convertible preferred stock - shares outstanding	104,757	100,486
Convertible preferred stock - liquidation preference	1,780,869
Preferred Class C
Convertible preferred stock - par value	$ 0.01	$ 0.01
Convertible preferred stock - shares authorized	200,000	200,000
Convertible preferred stock - shares issued	184,194	176,685
Convertible preferred stock - shares outstanding	184,194	176,685
Convertible preferred stock - liquidation preference	$ 1,215,680

Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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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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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.

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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

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The aggregate liquidation preference (or restrictions) of stock classified as temporary equity that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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