Condensed Balance Sheets [Parenthetical] (USD $)	Mar. 31, 2015	Dec. 31, 2014
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000us-gaap_CommonStockSharesAuthorized	100,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	9,032,979us-gaap_CommonStockSharesIssued	8,949,645us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	9,032,979us-gaap_CommonStockSharesOutstanding	8,949,645us-gaap_CommonStockSharesOutstanding
Redeemable convertible preferred stock [Member]
Temporary equity, par value (in dollars per share)	$ 0.01	$ 0.01
Temporary equity, shares authorized	1,000,000	1,000,000
Temporary equity, shares issued	168	168
Temporary equity, shares outstanding	168	168
Temporary equity, liquidation preference value	$ 168,496	$ 168,496

Face amount or stated value per share of common stock.

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