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Stock-Based Compensation (Tables)
6 Months Ended
Mar. 31, 2016
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, 2015

 

5,435,640

 

 

$

6.71

  

  

 

 

 

 

 

 

 

Granted

 

1,380,000

 

 

 

6.12

  

  

 

 

 

 

 

 

 

Cancelled

 

(87,182)

 

 

 

8.77

  

  

 

 

 

 

 

 

 

Exercised

 

(4,687)

 

 

 

5.45

  

  

 

 

 

 

 

 

 

Balance At March 31, 2016

 

6,723,771

  

 

$

6.57

  

  

 

7.8 years

 

 

$

3,002,814

 

Exercisable At March 31, 2016

 

3,250,256

 

 

$

6.15

 

 

 

6.7 years

 

 

$

2,262,299

 

 

Assumptions Used to Value Stock Options

The assumptions used to value stock options are as follows:

 

 

 

Six months ended March 31,

 

 

2016

 

2015

Dividend yield

 

 

Risk-free interest rate

 

1.44 – 1.89%

 

1.55 – 1.85%

Volatility

 

89%

 

75%

Expected life (in years)

 

6.25

 

6 - 6.25

Weighted average grant date fair value per share of options granted

 

$4.59

 

$3.54

 

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, 2015

 

934,167

  

 

$

9.18

 

Granted

 

830,000

 

 

 

6.15

 

Vested

 

(394,167

 

 

11.06

 

Forfeited

 

 

 

 

 

Unvested at March 31, 2016

 

1,370,000

 

 

$

6.80