Equity Compensation (Tables)
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6 Months Ended |
Jun. 30, 2017 |
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| Equity Compensation |
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| Summary of stock option activity |
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Weighted
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Average
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Shares Subject
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Weighted
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Remaining
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to Options
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Average
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Contractual
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Outstanding
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Exercise Price
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Life (Years)
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Balance at December 31, 2016
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3,776,405
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11.55
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Exercised
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(873,523)
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8.90
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Expired
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(54,401)
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17.52
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Forfeited
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(23,670)
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16.73
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Balance at June 30, 2017
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2,824,811
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12.20
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Exercisable options at June 30, 2017
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2,356,503
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11.73
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5.4
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Vested and expected to vest at June 30, 2017
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2,824,811
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12.20
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5.7
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| Summary of stock options outstanding and exercisable |
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Weighted
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Average
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Shares Subject
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Weighted
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Remaining
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to Options
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Average
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Contractual
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Outstanding
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Exercise Price
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Life (Years)
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Balance at December 31, 2016
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3,776,405
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11.55
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Exercised
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(873,523)
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8.90
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Expired
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(54,401)
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17.52
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Forfeited
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(23,670)
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16.73
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Balance at June 30, 2017
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2,824,811
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12.20
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Exercisable options at June 30, 2017
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2,356,503
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11.73
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5.4
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Vested and expected to vest at June 30, 2017
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2,824,811
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12.20
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5.7
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The following table summarizes information about stock options outstanding and exercisable at June 30, 2017:
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Options Outstanding
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Options Exercisable
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Weighted-
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Weighted-
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Weighted
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Average
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Average
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Average
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Number of
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Remaining
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Number of
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Remaining
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Exercise
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Underlying
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Contractual
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Underlying
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Contractual
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Range of Exercise Prices
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Price
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Shares
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Life (in years)
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Shares
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Life (in years)
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$
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3.59
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-
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6.14
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5.97
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904,662
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3.9
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904,662
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3.9
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$
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6.34
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-
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9.93
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8.45
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391,363
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6.0
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310,753
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5.3
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$
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11.28
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-
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16.97
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13.91
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892,486
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6.8
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605,003
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6.7
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$
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17.66
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-
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22.92
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20.98
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636,300
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6.5
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536,085
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6.5
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2,824,811
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2,356,503
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| 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):
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For the Six Months Ended
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and as of June 30,
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2017
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2016
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Options Exercised
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$
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6,734
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$
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585
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Options Exercisable
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19,345
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4,553
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Options Vested and Expected to Vest
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21,817
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4,574
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| Summary of restricted stock unit activity |
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Number of
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Weighted Average
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Shares
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Grant Date Fair Value
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Non-vested balance at December 31, 2016
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1,396,387
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7.60
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Awarded
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781,010
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11.23
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Vested
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(500,389)
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7.45
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Forfeited
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(53,317)
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8.62
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Non-vested balance at June 30, 2017
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1,623,691
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9.36
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| 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):
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Three Months Ended
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Six Months Ended
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June 30,
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June 30,
|
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2017
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2016
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2017
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2016
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Cost of revenue
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$
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61
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$
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47
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$
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119
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$
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90
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Research and development
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1,050
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890
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2,179
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1,704
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Sales and marketing
|
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884
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600
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1,948
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1,109
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General and administrative
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914
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590
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1,917
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1,047
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Total stock-based compensation expense
|
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$
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2,909
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$
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2,127
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$
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6,163
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$
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3,950
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