Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Common stock par value	$ 0.001	$ 0.001
Common stock shares authorized	300,000,000	300,000,000
Common stock shares issued	91,441,771	86,561,320
Common stock shares outstanding	91,441,771	86,561,320
Preferred stock par value	$ 0.001	$ 0.001
Preferred stock shares authorized	10,000,000	10,000,000
Preferred stock shares issued	0	0
Preferred stock shares outstanding	0	0