Consolidated Balance Sheets (Parenthetical) - $ / shares	Oct. 31, 2020	Oct. 31, 2019
Statement Of Financial Position [Abstract]
Common stock, par value	$ 0.001	$ 0.001
Common stock, authorized shares	605,000,000	605,000,000
Common stock, shares issued	63,403,326	62,217,486
Common stock, shares outstanding	63,403,326	62,217,486
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

Face amount or stated value per share of common stock.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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