Condensed Unaudited Consolidated Balance Sheets (Parenthetical) - $ / shares	Jul. 31, 2018	Oct. 31, 2017
Statement Of Financial Position [Abstract]
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, authorized shares	95,000,000	95,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, authorized shares	605,000,000	605,000,000
Common stock, shares issued	63,191,445	64,145,945
Common stock, shares outstanding	63,191,445	64,145,945