Stock-Based Compensation (Tables)

9 Months Ended

Jun. 30, 2018

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, 2017		5,549,543	$	6.00
Granted		739,000		4.71
Cancelled		(233,357)		6.97
Exercised		(283,627)		3.64
Balance At June 30, 2018		5,771,559	$	5.92		6.2 years	$	45,386,696
Exercisable At June 30, 2018		4,174,006	$	6.53		5.3 years	$	30,543,795

Assumptions Used to Value Stock Options

The assumptions used to value stock options are as follows:

	Nine Months Ended June 30,
	2018	2017
Dividend yield	—	—
Risk-free interest rate	2.1 – 2.8%	1.3 – 2.3%
Volatility	110%	79%
Expected life (in years)	6.25	5.75 - 6.25
Weighted average grant date fair value per share of options granted	$3.97	$1.33

Summary of Share Activity Related to RSUs

The following table summarizes the activity of the Company’s RSUs:

	Number of RSUs			Weighted- Average Grant Date Fair Value
Unvested at September 30, 2017		3,108,000		$	2.45
Granted		1,245,500			3.68
Vested		(1,005,333	)		2.35
Forfeited		(50,000	)		1.55
Unvested at June 30, 2018		3,298,167		$	2.96