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Stockholders' Equity (Tables)
9 Months Ended
Jun. 30, 2013
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
June 30,
     Nine Months Ended
June 30,
 
     2013      2012      2013      2012  

Sales and marketing

   $ 102,672       $ 214,140       $ 277,976       $ 394,881   

Research and development

     161,431         187,132         447,491         470,958   

General and administrative

     421,530         429,714         1,320,300         1,118,031   
  

 

 

    

 

 

    

 

 

    

 

 

 

Stock-based compensation expense included in operating expenses

   $ 685,633       $ 830,986       $ 2,045,767       $ 1,983,870  
Fair Value Calculations for Stock-Based Compensation Awards to Employees

The fair value calculations for stock-based compensation awards to employees for the nine months ended June 30, 2013 and 2012 were based on the following assumptions:

 

     Nine Months Ended
June 30, 2013
   Nine Months Ended
June 30, 2012

Risk-free interest rate

   0.18% - 0.84%    0.35% - 1.06%

Expected life (years)

   5.05    4.79

Expected volatility

   169%    90%

Expected dividends

   None    None
Stock Option Activity

The following table summarizes stock option activity under the Company’s stock option plans for the nine months ended June 30, 2013:

 

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

Outstanding, September 30, 2012

     3,512,286      $ 3.39         6.46   

Granted

     489,063      $ 2.96      

Exercised

     (1,103,582   $ 0.90      

Cancelled

     (227,024   $ 7.25      
  

 

 

      

Outstanding, June 30, 2013

     2,670,743      $ 4.01         7.40   
  

 

 

      
Significant Ranges of Outstanding and Exercisable Options

The following table summarizes significant ranges of outstanding and exercisable options as of June 30, 2013:

 

Range of Exercise Prices

   Number of
Options
Outstanding
     Weighted
Average
Remaining
Contractual Life
(in Years)
     Weighted
Average
Exercise Price
     Number of
Exercisable
Options
     Weighted
Average
Exercise Price of
Exercisable
Options
     Number of
Unvested
Options
 

$0.09 to $0.79

     405,841         6.52       $ 0.74         405,841       $ 0.74         —     

$0.80 to $1.95

     360,695         2.68       $ 0.94         360,695       $ 0.94         —     

$2.34 to $2.60

     803,252         8.08       $ 2.51         263,234       $ 2.60         540,018   

$3.33 to $9.97

     792,997         8.81       $ 5.84         188,657       $ 7.96         604,340   

$11.05 to $11.68

     307,958         8.63       $ 11.08         110,252       $ 11.08         197,706   
  

 

 

          

 

 

       

 

 

 
     2,670,743         7.40       $ 4.01         1,328,679       $ 3.04         1,342,064   
  

 

 

          

 

 

       

 

 

 
Number of Stock Options Outstanding Under Prior Plans

The following table summarizes the number of stock options outstanding under the Prior Plans as of June 30, 2013:

 

2000 Stock Option Plan

     215,412   

2002 Stock Option Plan

     226,100   

2006 Stock Option Plan

     49,000   

2010 Stock Option Plan

     1,121,710   
  

 

 

 

Total stock options outstanding under the Prior Plans

     1,612,222   
  

 

 

 
RSU Activity

The following table summarizes RSU activity under the Company’s equity plans during the nine months ended June 30, 2013:

 

     Number of
Shares
    Weighted Average
Fair Market Value
Per Share
 

Outstanding, September 30, 2012

     515,834      $ 6.30   

Granted

     215,000      $ 2.69   

Settled

     (32,079   $ 9.66   

Cancelled

     (27,501   $ 11.05   
  

 

 

   

Outstanding, June 30, 2013

     671,254      $ 4.79