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Stock-Based Compensation (Tables)
 3 Months Ended
Dec. 31, 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, 2017

 

5,549,543

 

 

$

6.00

  

  

 

 

 

 

 

 

 

Granted

 

115,000

 

 

 

3.60

  

  

 

 

 

 

 

 

 

Cancelled

 

(47,207)

 

 

 

13.70

  

  

 

 

 

 

 

 

 

Exercised

 

–

 

 

 

–

  

  

 

 

 

 

 

 

 

Balance At December 31, 2017

 

5,617,336

  

 

$

5.89

  

  

 

6.3 years

 

 

$

2,474,103

 

Exercisable At December 31, 2017

 

4,169,205

 

 

$

6.40

 

 

 

5.6 years

 

 

$

1,301,464

 

 
Assumptions Used to Value Stock Options

The assumptions used to value stock options are as follows:

 

 

 

Three Months Ended December 31,

 

 

2017

 

 

2016

Dividend yield

 

—

 

 

—

Risk-free interest rate

 

2.05 – 2.22%

 

 

1.34 – 1.44%

Volatility

 

110%

 

 

79%

Expected life (in years)

 

6.25

 

 

6.25

Weighted average grant date fair value per share of options granted

 

$3.03

 

 

$4.49

 
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

 

2,500

 

 

 

3.51

 

Vested

 

(10,000

) 

 

 

5.22

 

Forfeited

 

—

 

 

 

—

 

Unvested at December 31, 2017

 

3,100,500

 

 

$

2.44