Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Convertible preferred stock, par value	$ 0.0001	$ 0.0001
Convertible preferred stock, authorized	0	86,726,665
Convertible preferred stock, issued	0	21,444,251
Convertible preferred stock, outstanding	0	21,444,251
Convertible preferred stock, aggregate liquidation preference	$ 0	$ 115,404
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, authorized	500,000,000	135,000,000
Common stock, issued	32,940,948	5,083,616
Common stock, outstanding	32,940,948	5,083,616