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Benefit Plans (Tables)

12 Months Ended

Oct. 31, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Share-Based Compensation Reflected in Consolidated Statement of Operations and Comprehensive Loss

Share-based compensation was reflected in the Consolidated Statements of Operations and Comprehensive Loss as follows (in thousands):

		2020				2019				2018
Cost of revenues		$	344			$	593			$	543
General and administrative expense			1,424				1,865				2,256
Research and development expense			54				272				355
		$	1,822			$	2,730			$	3,154

Schedule of Fair Value of Stock Options Estimated on Grant Date

The fair value of stock options is estimated on the grant date using the Black-Scholes option valuation model as follows:

		2018
Expected life (in years)			7.0
Risk free interest rate			2.8	%
Volatility			72.7	%
Dividend yield			—	%

Summary of Stock Option Activity

The following table summarizes our stock option activity for the year ended October 31, 2020:

						Weighted- Average Option
Options		Shares				Price
Outstanding as of October 31, 2019			24,927			$	104.73
Cancelled and forfeited			(1,036	)		$	416.16
Outstanding as of October 31, 2020			23,891			$	91.23

Summary of Information about Stock Options Outstanding and Exercisable

The following table summarizes information about stock options outstanding and exercisable as of October 31, 2020:

		Options Outstanding												Options Exercisable
						Weighted
						Average				Weighted								Weighted
						Remaining				Average								Average
Range of		Number				Contractual				Exercise				Number				Exercise
Exercise Prices		outstanding				Life				Price				exercisable				Price
$0.00 — $38.76			13,192				6.9			$	19.16				13,192			$	19.16
$38.77 — $416.16			10,699				3.1			$	180.09				10,699			$	180.09
			23,891				5.2			$	91.23				23,891			$	91.23

Summary of RSA and RSU Activity

The following table summarizes our RSA and RSU activity for the year ended October 31, 2020:

						Weighted- Average
Restricted Stock Awards and Units		Shares				Fair Value
Outstanding as of October 31, 2019			191,115				16.11
Granted			1,978,108				2.84
Vested			(95,127	)			17.15
Forfeited			(6,956	)			17.79
Outstanding as of October 31, 2020			2,067,140				5.06

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Tabular disclosure of assumption used to determine benefit obligation and net periodic benefit cost of defined benefit plan. Includes, but is not limited to, discount rate, rate of compensation increase, expected long-term rate of return on plan assets and interest crediting rate.

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Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit.

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Tabular disclosure of activity for outstanding award under share-based payment arrangement excluding share and unit options and nonvested award.

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Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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