Equity Compensation (Tables)
6 Months Ended
Jun. 30, 2016
Equity Compensation  
Summary of stock option activity

 

 

 

 

 

 

 

 

 

 

 

 

 

    

 

    

 

 

    

 

 

    

Weighted

 

 

 

 

 

Weighted

 

 

 

 

Average

 

 

 

Shares Subject

 

Average

 

Weighted

 

Remaining

 

 

 

to Options

 

Grant Date

 

Average

 

Contractual

 

 

    

Outstanding

    

Fair Value

    

Exercise Price

    

Life (Years)

  

Balance at December 31, 2015

 

4,572,672

 

 

 

 

$

10.72

 

 

 

Granted

 

50,000

 

 

4.63

 

 

8.16

 

 

 

Exercised

 

(163,071)

 

 

 

 

 

4.36

 

 

 

Expired

 

(49,001)

 

 

 

 

 

13.38

 

 

 

Forfeited

 

(42,701)

 

 

 

 

 

16.02

 

 

 

Balance at June 30, 2016

 

4,367,899

 

 

 

 

 

10.85

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Exercisable options at June 30, 2016

 

3,317,629

 

 

 

 

 

9.54

 

5.2

 

Vested and expected to vest at June 30, 2016

 

3,316,345

 

 

 

 

 

10.79

 

5.8

 

 

Summary of stock options outstanding and exercisable

The following table summarizes information about stock options outstanding and exercisable at June 30, 2016:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Options Outstanding

 

Options Exercisable

 

 

 

 

 

    

 

 

    

 

    

Weighted-

    

 

    

Weighted-

 

 

 

 

 

 

Weighted

 

 

 

Average

 

 

 

Average

 

 

 

 

 

 

Average

 

Number of

 

Remaining

 

Number of

 

Remaining

 

 

 

 

 

 

Exercise

 

Underlying

 

Contractual

 

Underlying

 

Contractual

 

Range of Exercise Prices

    

Price

    

Shares

    

Life (in years)

    

Shares

    

Life (in years)

  

$

2.34

-

3.59

 

 

2.78

 

206,448

 

0.6

 

206,448

 

0.6

 

$

4.78

-

7.28

 

 

5.90

 

1,499,698

 

4.3

 

1,477,314

 

4.2

 

$

7.49

-

11.28

 

 

9.69

 

1,109,401

 

6.1

 

836,360

 

5.5

 

$

11.72

-

17.66

 

 

14.75

 

867,106

 

8.4

 

382,475

 

8.3

 

$

19.56

-

22.92

 

 

21.04

 

685,246

 

7.4

 

415,032

 

7.2

 

 

 

 

 

 

 

 

 

4,367,899

 

 

 

3,317,629

 

 

 

 

Summary of aggregate intrinsic-value of options exercised, exercisable, and vested and expected to vest

The following table summarizes the aggregate intrinsic-value of options exercised, exercisable and vested and expected to vest (in thousands):

 

 

 

 

 

 

 

 

 

 

 

 

For the Six Months Ended

 

 

 

and as of June 30,

 

 

    

2016

    

2015

 

Options Exercised

 

$

585

 

$

1,039

 

Options Exercisable

 

 

4,553

 

 

6,991

 

Options Vested and Expected to Vest

 

 

4,574

 

 

7,266

 

Schedule of assumptions used to estimate fair value of option awards

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Three Months Ended

 

Six Months Ended

 

 

 

June 30,

 

June 30,

 

 

    

2016

    

 

2015

    

 

2016

    

 

2015

 

 

Expected volatility

 

 

 

62

%  

 

 

 

53

%  

 

 

 

62

%  

 

53

-

55

%  

 

Expected dividends

 

 

 

0

%  

 

 

 

0

%  

 

 

 

0

%  

 

 

 

0

%  

 

Expected terms (in years)

 

 

 

6.1

 

 

5.3

-

6.1

 

 

 

 

6.1

 

 

5.3

-

6.1

 

 

Risk-free rate

 

 

 

1.1

%  

 

1.5

-

1.8

%  

 

 

 

1.1

%  

 

1.3

-

1.8

%  

 

 

Summary of restricted stock unit activity

 

 

 

 

 

 

 

 

 

Number of

 

Weighted Average

 

 

    

Shares

    

Grant Date Fair Value

 

Non-vested balance at December 31, 2015

 

425,000

 

$

8.18

 

Awarded

 

1,139,846

 

 

7.37

 

Forfeited

 

(50,000)

 

 

7.32

 

Non-vested balance at June 30, 2016

 

1,514,846

 

 

7.60

 

 

Schedule of total stock-based compensation expense classified in statements of operations

Total stock-based compensation expense has been classified as follows in the accompanying Condensed Consolidated Statements of Operations (in thousands):

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Three Months Ended

 

Six Months Ended

 

 

 

June 30,

 

June 30,

 

 

    

2016

    

2015

    

2016

    

2015

 

Cost of revenue

 

$

47

 

$

39

 

$

90

 

$

86

 

Research and development

 

 

890

 

 

667

 

 

1,704

 

 

1,439

 

Sales and marketing

 

 

600

 

 

387

 

 

1,109

 

 

841

 

General and administrative

 

 

590

 

 

586

 

 

1,047

 

 

1,162

 

Total stock-based compensation expense

 

$

2,127

 

$

1,679

 

$

3,950

 

$

3,528