Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Consolidated Balance Sheets
Common stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Common stock, authorized	200,000,000	200,000,000
Common stock, issued	78,773,736	65,881,122
Common stock, outstanding	78,773,736	65,881,122