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Stockholders' Equity (Tables)
12 Months Ended
Sep. 30, 2016
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, 2016 and 2015 were based on the following assumptions:

 

 

 

2016

 

 

2015

 

Risk-free interest rate

 

1.43% - 1.66%

 

 

1.29% - 1.66%

 

Expected life (years)

 

5.9

 

 

5.3

 

Expected volatility

 

 

83%

 

 

 

90%

 

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, 2016, 2015 and 2014, which were allocated as follows (amounts shown in thousands):

 

 

 

2016

 

 

2015

 

 

2014

 

Sales and marketing

 

$

1,122

 

 

$

743

 

 

$

824

 

Research and development

 

 

669

 

 

 

592

 

 

 

675

 

General and administrative

 

 

2,288

 

 

 

2,032

 

 

 

1,945

 

Acquisition-related costs and expenses

 

 

1,503

 

 

 

393

 

 

 

 

Stock-based compensation expense related to employee

   stock options included in operating expenses

 

$

5,582

 

 

$

3,760

 

 

$

3,444

 

 

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, 2016:

 

 

 

Number of

Shares

 

 

Weighted

Average

Exercise Price

Per Share

 

 

Weighted

Average

Remaining

Contractual Life

(in Years)

 

 

Aggregate

Intrinsic

Value

 

Vested

 

 

2,107,825

 

 

$

4.31

 

 

 

5.55

 

 

$

9,491,803

 

Unvested

 

 

907,549

 

 

$

3.11

 

 

 

8.33

 

 

 

4,700,241

 

Total

 

 

3,015,374

 

 

$

3.95

 

 

 

6.39

 

 

$

14,192,044

 

 

Stock Option Activity

The following table summarizes stock option activity under the Company’s stock option plans during the fiscal years ended September 30, 2016, 2015 and 2014:

 

 

 

Number of

Shares

 

 

Weighted

Average

Exercise Price

Per Share

 

 

Weighted

Average

Remaining

Contractual Term

(in Years)

 

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

 

Granted

 

 

98,500

 

 

$

4.51

 

 

 

 

 

Exercised

 

 

(661,663

)

 

$

2.67

 

 

 

 

 

Cancelled

 

 

(69,168

)

 

$

4.51

 

 

 

 

 

Outstanding, September 30, 2016

 

 

3,015,374

 

 

$

3.95

 

 

 

6.39

 

 

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, 2016:

 

2000 Stock Option Plan

 

 

6,262

 

2002 Stock Option Plan

 

 

36,750

 

2006 Stock Option Plan

 

 

43,000

 

2010 Stock Option Plan

 

 

1,012,716

 

Total stock options outstanding under the Prior Plans

 

 

1,098,728

 

 

RSU Activity

The following table summarizes RSU activity in the fiscal years ended September 30, 2016, 2015 and 2014:

 

 

 

Number of

shares

 

 

Weighted-

average

fair value

per share

 

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

 

Granted

 

 

1,536,000

 

 

$

4.82

 

Settled

 

 

(261,621

)

 

$

4.77

 

Cancelled

 

 

(31,127

)

 

$

4.19

 

Outstanding at September 30, 2016

 

 

2,046,169

 

 

$

4.90