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Stockholders' Equity (Tables)
 12 Months Ended
Sep. 30, 2015
Equity [Abstract]  
Fair Value Calculations for Stock-Based Compensation Awards

The fair value calculations for stock-based compensation awards to employees for the fiscal years ended September 30, 2015 and 2013 were based on the following assumptions:

 

 

 

2015

 

 

2013

 

Risk-free interest rate

 

1.29% - 1.66%

 

 

0.18% - 1.20%

 

Expected life (years)

 

5.3

 

 

 

5.3

 

Expected volatility

 

 

90%

 

 

 

175%

 

Expected dividends

 

None

 

 

None

 

 
Stock-Based Compensation Expense Related to Stock Options and RSUs

The following table summarizes stock-based compensation expense under ASC 718 for the fiscal years ended September 30, 2015, 2014 and 2013, which were allocated as follows:

 

 

 

2015

 

 

2014

 

 

2013

 

Sales and marketing

 

$

743,534

 

 

$

823,876

 

 

$

433,130

 

Research and development

 

 

592,297

 

 

 

675,033

 

 

 

617,377

 

General and administrative

 

 

2,031,655

 

 

 

1,945,571

 

 

 

1,741,355

 

Acquisition-related costs and expenses

 

 

392,982

 

 

 

-

 

 

 

-

 

Stock-based compensation expense related to employee

   stock options included in operating expenses

 

$

3,760,468

 

 

$

3,444,480

 

 

$

2,791,862

 

 
Summary of Vested and Unvested Options, Weighted Average Exercise Price per Share, Weighted Average Remaining Term and Aggregate Intrinsic Value

The following table summarizes vested and unvested options, weighted average exercise price per share, weighted average remaining term and aggregate intrinsic value at September 30, 2015:

 

 

 

Number of Shares

 

 

Weighted Average

Exercise Price Per

Share

 

 

Weighted Average

Remaining

Contractual Life

(in Years)

 

 

Aggregate Intrinsic

Value

 

Vested

 

 

1,785,034

 

 

$

4.39

 

 

 

5.20

 

 

$

1,548,344

 

Unvested

 

 

1,862,671

 

 

$

3.04

 

 

 

9.01

 

 

 

743,541

 

Total

 

 

3,647,705

 

 

$

3.70

 

 

 

7.15

 

 

$

2,291,885

 

 
Stock Option Activity

The following table summarizes stock option activity under the Company’s stock option plans during the fiscal years ended September 30, 2015, 2014 and 2013:

 

 

 

Number of

Shares

 

 

Weighted Average

Exercise Price Per

Share

 

 

Weighted Average

Remaining

Contractual Term

(in Years)

 

Outstanding, September 30, 2012

 

 

3,512,286

 

 

$

3.39

 

 

 

6.46

 

Granted

 

 

651,563

 

 

$

3.63

 

 

 

 

 

Exercised

 

 

(1,103,582

)

 

$

0.90

 

 

 

 

 

Cancelled

 

 

(235,303

)

 

$

7.26

 

 

 

 

 

Outstanding, September 30, 2013

 

 

2,824,964

 

 

$

4.09

 

 

 

7.29

 

Granted

 

 

—

 

 

$

—

 

 

 

 

 

Exercised

 

 

(108,135

)

 

$

1.27

 

 

 

 

 

Cancelled

 

 

(382,503

)

 

$

4.77

 

 

 

 

 

Outstanding, September 30, 2014

 

 

2,334,326

 

 

$

4.11

 

 

 

5.46

 

Granted

 

 

1,927,500

 

 

$

2.92

 

 

 

 

 

Exercised

 

 

(232,203

)

 

$

1.06

 

 

 

 

 

Cancelled

 

 

(381,918

)

 

$

3.85

 

 

 

 

 

Outstanding, September 30, 2015

 

 

3,647,705

 

 

$

3.70

 

 

 

7.15

 

 
Number of Stock Options Outstanding under Prior Plans

The following table summarizes the number of stock options outstanding under the Prior Plans as of September 30, 2015:

 

2000 Stock Option Plan

 

 

6,262

 

2002 Stock Option Plan

 

 

189,338

 

2006 Stock Option Plan

 

 

43,000

 

2010 Stock Option Plan

 

 

1,037,669

 

Total stock options outstanding under the Prior Plans

 

 

1,276,269

 

 
RSU Activity

The following table summarizes RSU activity in the fiscal years ended September 30, 2015, 2014 and 2013:

 

 

 

Number of

shares

 

 

Weighted-average

fair value per share

 

Outstanding at September 30, 2012

 

 

515,834

 

 

$

6.30

 

Granted

 

 

255,000

 

 

$

3.15

 

Settled

 

 

(50,829

)

 

 

7.76

 

Cancelled

 

 

(27,501

)

 

$

11.05

 

Outstanding at September 30, 2013

 

 

692,504

 

 

$

4.85

 

Granted

 

 

625,139

 

 

$

4.83

 

Settled

 

 

(63,334

)

 

$

4.66

 

Cancelled

 

 

(153,006

)

 

$

5.03

 

Outstanding at September 30, 2014

 

 

1,101,303

 

 

$

4.71

 

Granted

 

 

104,000

 

 

$

2.29

 

Settled

 

 

(255,041

)

 

$

2.96

 

Cancelled

 

 

(147,345

)

 

$

3.54

 

Outstanding at September 30, 2015

 

 

802,917

 

 

$

4.49