Equity Compensation (Tables)
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6 Months Ended |
Jun. 30, 2018 |
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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, 2017
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2,069,802
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12.13
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Exercised
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(279,012)
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11.31
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Expired
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(2,809)
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5.72
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Forfeited
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(3,587)
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13.65
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Balance at June 30, 2018
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1,784,394
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12.27
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Exercisable options at June 30, 2018
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1,649,277
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12.30
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4.7
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Vested and expected to vest at June 30, 2018
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1,784,394
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12.27
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4.8
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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, 2017
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2,069,802
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12.13
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Exercised
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(279,012)
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11.31
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Expired
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(2,809)
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5.72
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Forfeited
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(3,587)
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13.65
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Balance at June 30, 2018
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1,784,394
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12.27
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Exercisable options at June 30, 2018
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1,649,277
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12.30
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4.7
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Vested and expected to vest at June 30, 2018
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1,784,394
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12.27
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4.8
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The following table summarizes information about stock options outstanding and exercisable at June 30, 2018:
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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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4.89
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-
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7.49
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6.09
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655,341
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3.1
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647,967
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3.0
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$
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8.16
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-
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12.93
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10.52
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380,848
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5.6
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305,478
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5.3
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$
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12.98
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-
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19.56
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15.60
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344,008
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6.4
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291,635
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6.4
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$
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20.91
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-
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22.92
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21.08
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404,197
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5.6
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404,197
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5.6
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1,784,394
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1,649,277
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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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2018
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2017
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Options Exercised
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$
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3,693
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$
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6,734
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Options Exercisable
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19,801
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19,345
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Options Vested and Expected to Vest
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21,492
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21,817
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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, 2017
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1,290,660
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$
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9.75
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Awarded
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436,750
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28.15
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Vested
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(581,886)
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10.28
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Forfeited
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(34,250)
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9.54
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Non-vested balance at June 30, 2018
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1,111,274
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16.72
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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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2018
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2017
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2018
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2017
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Cost of revenue
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$
|
55
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$
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61
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$
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123
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$
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119
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Research and development
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1,034
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1,050
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2,118
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2,179
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Sales and marketing
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977
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884
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1,936
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1,948
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General and administrative
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1,255
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914
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2,479
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1,917
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Total stock-based compensation expense
|
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$
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3,321
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$
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2,909
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$
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6,656
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$
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6,163
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