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Stock-Based Compensation
6 Months Ended
Jun. 30, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Stock-Based Compensation

Note 4. Stock-Based Compensation

The following table summarizes option award activity under our equity incentive plans for the year ended December 31, 2015 and the six months ended June 30, 2016 (in thousands, except per share data):

 

 

 

Number of

Shares Underlying

Options

 

 

Weighted-Average

Exercise Price

Per Share

 

 

Weighted-Average

Remaining

Contractual

Life (Years)

 

 

Total Intrinsic

Value

 

Outstanding at December 31, 2015

 

 

1,896

 

 

$

3.72

 

 

$

7.77

 

 

$

8,666

 

Granted

 

 

99

 

 

 

8.48

 

 

 

 

 

 

 

 

 

Exercised

 

 

(96

)

 

 

3.72

 

 

 

 

 

 

 

 

 

Forfeited or Cancelled

 

 

(54

)

 

 

5.17

 

 

 

 

 

 

 

 

 

Outstanding at June 30, 2016

 

 

1,845

 

 

 

3.95

 

 

 

7.39

 

 

 

8,693

 

Vested and exercisable at June 30, 2016

 

 

1,000

 

 

 

2.17

 

 

 

6.22

 

 

 

6,490

 

 

As of June 30, 2016, there was a total of $2.0 million in unrecognized compensation cost related to unvested stock options.

The following table presents the effects of stock-based compensation in our condensed consolidated statements of operations during the periods presented (in thousands):

 

 

 

Six Months Ended

 

 

Three Months Ended

 

 

 

June 30,

 

 

June 30,

 

 

 

2016

 

 

2015

 

 

2016

 

 

2015

 

Cost of revenue

 

$

11

 

 

$

21

 

 

$

6

 

 

$

8

 

Research and development expense

 

 

134

 

 

 

184

 

 

 

65

 

 

 

81

 

Sales and marketing expense

 

 

411

 

 

 

317

 

 

 

206

 

 

 

173

 

General and administrative expense

 

 

106

 

 

 

78

 

 

 

51

 

 

 

32

 

Total stock-based compensation expense

 

 

662

 

 

 

600

 

 

 

328

 

 

 

294