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Benefit Plans - Summary of Information about Stock Options Outstanding and Exercisable (Details)	12 Months Ended
	Oct. 31, 2018 $ / shares shares
Share based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Number outstanding | shares	323,486
Options Outstanding, Weighted Average Remaining Contractual Life	6 years 4 months 24 days
Options Outstanding, Weighted Average Exercise Price	$ 10.34
Options Exercisable, Number exercisable | shares	267,319
Options Exercisable, Weighted Average Exercise Price	$ 12.07
$0.00 — $3.23 [Member]
Share based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Range Limit	0.00
Range of Exercise Prices, Upper Range Limit	$ 3.23
Options Outstanding, Number outstanding | shares	158,322
Options Outstanding, Weighted Average Remaining Contractual Life	8 years 9 months 18 days
Options Outstanding, Weighted Average Exercise Price	$ 1.60
Options Exercisable, Number exercisable | shares	103,819
Options Exercisable, Weighted Average Exercise Price	$ 1.50
$3.24 — $61.20 [Member]
Share based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Range Limit	3.24
Range of Exercise Prices, Upper Range Limit	$ 61.20
Options Outstanding, Number outstanding | shares	165,164
Options Outstanding, Weighted Average Remaining Contractual Life	4 years 1 month 6 days
Options Outstanding, Weighted Average Exercise Price	$ 18.72
Options Exercisable, Number exercisable | shares	163,500
Options Exercisable, Weighted Average Exercise Price	$ 18.79

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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