Stock-Based Compensation (Tables)

12 Months Ended

Sep. 30, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summarized Information about Stock Options

The following table summarizes information about stock options:

	Number of Options Outstanding		Weighted- Average Exercise Price Per Share		Weighted- Average Remaining Contractual Term		Aggregate Intrinsic Value
Balance At September 30, 2016		6,691,200	$	6.56
Granted		638,000		1.95
Cancelled		(1,643,927)		7.02
Exercised		(135,730)		2.01
Balance At September 30, 2017		5,549,543	$	6.00		6.5 years	$	3,390,029
Exercisable At September 30, 2017		4,065,611	$	6.32		5.8 years	$	1,872,018

Assumptions Used to Value Stock Options

The assumptions used to value stock options are as follows:

	Years ended September 30,
	2017	2016	2015
Dividend yield	—	—	—
Risk-free interest rate	1.34 – 2.31%	1.05 – 1.89%	1.46 – 1.89%
Volatility	79%	89%	75%
Expected life (in years)	5.85	6.25	6 - 6.25
Weighted average grant date fair value per share of options granted	$1.33	$4.58	$4.24

Summary of Share Activity Related to Restricted Stock Units

The following table summarizes the activity of the Company’s Restricted Stock Units:

	Number of RSUs			Weighted- Average Grant Date Fair Value
Unvested at September 30, 2016		1,356,667		$	6.72
Granted		2,623,000			1.59
Vested		(786,667	)		7.03
Forfeited		(85,000	)		1.55
Unvested at September 30, 2017		3,108,000		$	2.45