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Benefit Plans - Summary of RSA and RSU Activity (Details)	12 Months Ended
	Oct. 31, 2019 $ / shares shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Restricted Stock Awards and Units, Outstanding, Shares, Beginning Balance | shares	364,215
Restricted Stock Awards and Units, Granted, Shares | shares	71,885
Restricted Stock Awards and Units, Vested, Shares | shares	(177,961)
Restricted Stock Awards and Units, Forfeited, Shares | shares	(67,024)
Restricted Stock Awards and Units, Outstanding, Shares, Ending Balance | shares	191,115
Restricted Stock Awards and Units, Outstanding, Weighted-Average Fair Value, Beginning Balance | $ / shares	$ 24.36
Restricted Stock Awards and Units, Granted, Weighted-Average Fair Value | $ / shares	4.40
Restricted Stock Awards and Units, Vested, Weighted-Average Fair Value | $ / shares	20.59
Restricted Stock Awards and Units, Forfeited, Weighted-Average Fair Value | $ / shares	22.40
Restricted Stock Awards and Units, Outstanding, Weighted-Average Fair Value, Ending Balance | $ / shares	$ 16.11

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Number of shares under non-option equity instrument agreements that were cancelled as a result of occurrence of a terminating event.

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Net number of non-option equity instruments granted to participants.

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