Benefit Plans (Tables)

12 Months Ended

Oct. 31, 2018

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Share-Based Compensation Reflected in Consolidated Statement of Operations

Share-based compensation was reflected in the consolidated statements of operations as follows (in thousands):

	2018		2017		2016
Cost of revenues	$	543	$	1,050	$	745
General and administrative expense		2,256		2,721		2,110
Research and development expense		355		679		504
	$	3,154	$	4,450	$	3,359

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 and the following weighted-average assumptions:

	2018			2017			2016
Expected life (in years)		7.0			7.0			7.0
Risk free interest rate		2.8	%		2.2	%		1.5	%
Volatility		72.7	%		79.5	%		80.1	%
Dividend yield		—	%		—	%		—	%

Summary of Stock Option Activity

The following table summarizes our stock option activity for the year ended October 31, 2018:

				Weighted- Average Option
Options	Shares			Price
Outstanding as of October 31, 2017		309,950		$	23.81
Granted		54,503		$	1.78
Canceled		(40,967	)	$	100.85
Outstanding as of October 31, 2018		323,486		$	10.34

Summary of Information about Stock Options Outstanding and Exercisable

The following table summarizes information about stock options outstanding and exercisable as of October 31, 2018:

	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 — $3.23		158,322		8.8	$	1.60		103,819	$	1.50
$3.24 — $61.20		165,164		4.1	$	18.72		163,500	$	18.79
		323,486		6.4	$	10.34		267,319	$	12.07

Summary of RSA and RSU Activity

The following table summarizes our RSA and RSU activity for the year ended October 31, 2018:

				Weighted- Average
Restricted Stock Awards and Units	Shares			Fair Value
Outstanding as of October 31, 2017		3,008,686			2.52
Granted		2,545,715			1.75
Vested		(925,662	)		2.80
Forfeited		(258,164	)		2.19
Outstanding as of October 31, 2018		4,370,575			2.03

Fair Value of Shares Issued under Previous Employee Stock Purchase Plan Determined at Grant Date

The fair value of shares issued under the previous Employee Stock Purchase Plan was determined at the grant date using the Black-Scholes option-pricing model with the following weighted average assumptions for the years ended October 31, 2017 and 2016:

	2017			2016
Expected life (in years)		0.5			0.5
Risk free interest rate		0.46	%		0.30	%
Volatility		75.0	%		37.0	%
Dividends yield	—%			—%