Stock-Based Compensation (Tables)

12 Months Ended

Sep. 30, 2014

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summarize 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, 2012		1,910,794			6.10
Granted		1,509,166			2.03
Cancelled		-			-
Exercised		(675	)		3.93
Balance At September 30, 2013		3,419,285			4.68
Granted		1,039,000			14.05
Cancelled		(152,582)			6.05
Exercised		(454,863)			6.00
Balance At September 30, 2014		3,850,840			6.99		8.1 years		$31,141,826
Exercisable At September 30, 2014		1,684,919			5.94		7.2 years		$15,518,772

Assumptions Used to Value Stock Options

The assumptions used to value stock options are as follows:

	Year ended September 30,
	2014	2013	2012
Dividend yield	—	—	—
Risk-free interest rate	1.8% to 2.4%	0.7% to  2.3%	0.9%  to 1.7%
Volatility	69%	69%	90% - 100%
Expected life (in years)	6.25 to 9.47	5.5 to 6.25	5.5 to 6.25
Weighted average grant date fair value per share of options granted	$8.92	$1.88	$3.32

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, 2012		—	$	—
Granted		—		—
Vested		—		—
Forfeited		—		—
Unvested at September 30, 2013		—		—
Granted		510,000	$	14.58
Vested		—		—
Forfeited		—		—
Unvested at September 30, 2014		510,000	$	14.58