Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2011	Dec. 31, 2010
Stockholders' equity:
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	187,500,000	187,500,000
Common stock, shares issued	135,055,505	127,119,323
Common stock, shares outstanding	135,055,505	127,119,323