Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)	Sep. 30, 2011	Dec. 31, 2010
Stockholders' equity:
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	500,000	500,000
Preferred stock, shares issued	0.004	0
Preferred stock, shares outstanding	0.004	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	182,858,000	177,046,000
Common stock, shares outstanding	182,858,000	177,046,000