Condensed Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2012	Dec. 31, 2011
Statement Of Financial Position [Abstract]
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	30,000,000	30,000,000
Preferred stock, shares issued	8,615,670	10,995,807
Preferred stock, shares outstanding	8,615,670	10,995,807
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	2,294,442	2,101,849
Common stock, shares outstanding	2,294,442	2,101,849