Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Jul. 31, 2011	Oct. 31, 2010
Stockholders' equity:
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	40,952,586	39,326,376
Common stock, shares outstanding	40,952,586	39,326,376