Stock Based Compensation Arrangements (Tables)

3 Months Ended

Jan. 31, 2018

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

In the three months ended January 31, 2018 and 2017, the Company recorded stock-based compensation expense related to restricted stock awards and stock options as follows (in thousands):

	For the Three Months Ended January 31,
	2018		2017
General and administrative expense:
Continuing operations	$	8,910	$	3,975
Discontinued operations		-		442
		8,910		4,417
Research and development expense:
Continuing operations		2,221		-
Total stock-based compensation expense	$	11,132	$	4,417

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 assumptions for the three months ended January 31, 2018:

Risk free annual interest rate	2.01%-2.65	%
Expected volatility	81.32-85.54	%
Expected life	5.00-6.01
Assumed dividends	None

Schedule of Share-based Compensation, Restricted Stock Activity

Restricted stock and restricted stock units 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, 2017		227,132		$	7.83
Granted		102,500		$	23.91
Vested		(97,049	)	$	12.53
Unvested - January 31, 2018		232,583		$	12.95

Employee Stock Option [Member]

Schedule of Share-based Compensation, Stock Options, Activity

A summary of the Company’s employee stock option activity in the three months ended January 31, 2018 is presented below:

	Number of shares			Weighted-Average Exercise Price
Outstanding - October 31, 2017		3,525,530		$	6.34
Granted		1,030,500		$	24.47
Exercised		(10,794	)	$	5.10
Forfeited		(34,167	)	$	18.90
Outstanding - January 31, 2018		4,511,069		$	10.39
Options exercisable - January 31, 2018		1,930,500		$	5.79
Weighted-average fair value of options granted during the period				$	16.57

Non-Employee Stock Option [Member]

Schedule of Share-based Compensation, Stock Options, Activity

A summary of the Company’s non-employee stock option activity in the three months ended January 31, 2018 is presented below:

	Number of shares		Weighted-Average Exercise Price
Outstanding - October 31, 2017		293,000	$	19.61
No activity		-	$	-
Outstanding - January 31, 2018		293,000	$	19.61
Options exercisable - January 31, 2018		63,292	$	14.24