Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Common stock, par value	$ 0.00001	$ 0.00001
Common stock, authorized	200,000,000	200,000,000
Common stock, issued	78,350,361	65,881,122
Common stock, outstanding	78,350,361	65,881,122