BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	25,000,000us-gaap_PreferredStockSharesAuthorized	25,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued
Preferred stock, shares outstanding	0us-gaap_PreferredStockSharesOutstanding	0us-gaap_PreferredStockSharesOutstanding
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	100,000,000us-gaap_CommonStockSharesAuthorized	100,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	14,036,985us-gaap_CommonStockSharesIssued	494,260us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	14,007,754us-gaap_CommonStockSharesOutstanding	465,029us-gaap_CommonStockSharesOutstanding
Treasury stock, shares	29,231us-gaap_TreasuryStockShares	29,231us-gaap_TreasuryStockShares
Series A Preferred Stock
Convertible preferred stock, par value (in dollars per share)		$ 0.001
Convertible preferred stock, shares authorized		18,777,860
Convertible preferred stock, shares issued		18,777,860
Convertible preferred stock, shares outstanding		18,777,860
Series B Preferred Stock
Convertible preferred stock, par value (in dollars per share)		$ 0.001
Convertible preferred stock, shares authorized		15,275,824
Convertible preferred stock, shares issued		12,220,661
Convertible preferred stock, shares outstanding		12,220,661
Series C Preferred Stock
Convertible preferred stock, par value (in dollars per share)		$ 0.001
Convertible preferred stock, shares authorized		18,900,000
Convertible preferred stock, shares issued		18,381,463
Convertible preferred stock, shares outstanding		18,381,463

Face amount or stated value per share of common stock.

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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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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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Per share amount of par value or stated value of stock classified as temporary equity. 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.

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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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