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Stockholders' Equity (Tables)
3 Months Ended
Dec. 31, 2014
Equity [Abstract]  
Stock-Based Compensation Expense Related to Stock Options and RSUs

The following table summarizes stock-based compensation expense related to stock options and RSUs, which was allocated as follows:

 

     Three months ended
December 31,
 
     2014      2013  

Sales and marketing

   $ 175,118       $ 201,524   

Research and development

     137,406         184,888   

General and administrative

     501,536         442,659   
  

 

 

    

 

 

 

Stock-based compensation expense included in operating expenses

$ 814,060    $ 829,071   
  

 

 

    

 

 

 
Fair Value Calculations for Stock-Based Compensation Awards

The fair value calculations for stock-based compensation awards to employees for the three months ended December 31, 2014 were based on the following assumptions:

 

     Three Months
Ended
December 31, 2014

Risk-free interest rate

   1.63% – 1.66%

Expected life (years)

   5.25

Expected volatility

   98%

Expected dividends

   None
Stock Option Activity

The following table summarizes stock option activity under the Company’s equity plans during the three months ended December 31, 2014:

 

     Number of
Shares
     Weighted-
Average
Exercise Price
     Weighted-
Average
Remaining
Contractual Term
(in Years)
 

Outstanding, September 30, 2014

     2,334,326       $ 4.11         5.46   

Granted

     1,355,500       $ 2.67      

Exercised

     (4,166    $ 2.34      

Cancelled

     (162,595    $ 4.90      
  

 

 

       

Outstanding, December 31, 2014

  3,523,065    $ 3.52      7.24   
  

 

 

       
RSU Activity

The following table summarizes RSU activity under the Company’s equity plans during the three months ended December 31, 2014:

 

     Number of
Shares
     Weighted-
Average
Fair Market Value
Per Share
 

Outstanding, September 30, 2014

     1,101,303       $ 4.71   

Granted

     104,000       $ 2.29   

Settled

     (129,459    $ 2.65   

Cancelled

     (39,336    $ 4.07   
  

 

 

    

Outstanding, December 31, 2014

  1,036,508    $ 4.45