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Stock-Based Compensation (Tables)
12 Months Ended
Sep. 30, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Summarized Information about Stock Options

The following tables 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, 2014

 

3,850,840

 

 

 

6.99

  

  

 

 

 

 

 

 

 

Granted

 

1,729,000

 

 

 

6.35

  

  

 

 

 

 

 

 

 

Cancelled

 

(115,442)

 

 

 

11.38

  

  

 

 

 

 

 

 

 

Exercised

 

(28,758)

 

 

 

3.54

  

  

 

 

 

 

 

 

 

Balance At September 30, 2015

 

5,435,640

  

 

$

6.71

  

  

 

7.9 years

 

 

$

5,520,448

 

Exercisable At September 30, 2015

 

2,683,856

 

 

$

6.07

 

 

 

7.0 years

 

 

$

3,554,184

 

 

Assumptions Used to Value Stock Options

The assumptions used to value stock options are as follows:

 

 

 

Year ended September 30,

 

 

2015

 

2014

 

2013

Dividend yield

 

 

 

Risk-free interest rate

 

1.46 – 1.89%

 

1.8 – 2.4%

 

0.7 – 2.3%

Volatility

 

75%

 

69%

 

69%

Expected life (in years)

 

6 - 6.25

 

6.25 – 9.47

 

5.5 – 6.25

Weighted average grant date fair value per share of options granted

 

$4.24

 

$8.92

 

$1.88

 

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, 2014

 

510,000

  

 

$

14.58

 

Granted

 

705,000

 

 

 

7.41

 

Vested

 

(280,833

 

 

14.56

 

Forfeited

 

 

 

 

 

Unvested at September 30, 2015

 

934,167

 

 

$

9.18