Stock-Based Compensation (Tables)

12 Months Ended

Oct. 31, 2017

Schedule of Share-based Compensation Related to Restricted Stock Awards and Stock Options

In the years ended October 31, 2017 and 2016, the Company recorded stock-based compensation expense related to restricted stock awards and stock options as follows (in thousands):

	For the Years Ended October 31,
	2017		2016
General and administrative expense:
Continuing operations	$	14,869	$	2,042
Discontinued operations		1,118		1,100
		15,987		3,142
Research and development expense:
Continuing operations		1,758		-
Total stock-based compensation expense	$	17,745	$	3,142

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model with the following range of assumptions for the years ended October 31:

	October 31,
	2017			2016
Risk free annual interest rate		1.64%-2.43	%		1.03%-1.73	%
Expected volatility		71.65-86.48	%		77.49-81.91	%
Expected term of options (years)		5.04-6.01			2.75-5.26
Assumed dividends		-			-

Schedule of Share-based Compensation, Restricted Stock Activity

Restricted-stock activity for employees and non-employees in the fiscal year ended October 31, 2017:

	Number of shares			Weighted-Average Grant-Date Fair Value
Unvested, October 31, 2015		230,799		$	7.47
Granted		356,666		$	5.14
Vested		(312,636	)	$	6.10
Unvested - October 31, 2016		274,829		$	6.00
Granted		1,057,500		$	4.80
Vested		(1,105,197	)	$	4.47
Unvested - October 31, 2017		227,132		$	7.83

Employee Stock Option [Member]

Schedule of Share-based Compensation, Stock Options, Activity

Employee stock-option activity in the fiscal year ended October 31, 2017:

	Number of shares			Weighted-Average Exercise Price
Outstanding, October 31, 2015		97,771		$	16.81
Granted		347,010		$	4.84
Forfeited		(12,258	)	$	36.97
Exercised		(31,657	)	$	4.08
Expired		(17,656	)	$	30.72
Outstanding - October 31, 2016		383,210		$	5.74
Granted		3,482,000		$	6.29
Exercised		(268,847	)	$	4.84
Forfeited		(70,833	)		6.42
Outstanding - October 31, 2017		3,525,530		$	6.34
Options exercisable, October 31, 2017		1,415,440		$	4.26
Weighted-average grant date fair value of options granted during the year				$	4.28

Non-Employee Stock Option [Member]

Schedule of Share-based Compensation, Stock Options, Activity

Non-employee stock option activity in the fiscal year ended October 31, 2017:

	Number of shares		Weighted-Average Exercise Price
Outstanding - October 31, 2016		-	$	-
Granted		293,000	$	19.61
Outstanding - October 31, 2017		293,000	$	19.61
Options exercisable - October 31, 2017		26,667	$	6.87