Equity Compensation (Tables)
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3 Months Ended |
Mar. 31, 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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Weighted
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Average
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Shares Subject
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Average
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Weighted
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Remaining
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to Options
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Grant Date
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Average
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Contractual
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Outstanding
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Fair Value
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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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(196,476)
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10.63
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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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(1,996)
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14.03
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Balance at March 31, 2018
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1,868,521
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12.30
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Exercisable options at March 31, 2018
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1,665,674
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12.30
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4.8
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Vested and expected to vest at March 31, 2018
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1,868,521
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12.30
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5.0
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| Summary of stock options outstanding and exercisable |
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Weighted
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Weighted
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Average
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Shares Subject
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Average
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Weighted
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Remaining
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to Options
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Grant Date
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Average
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Contractual
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Outstanding
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Fair Value
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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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(196,476)
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10.63
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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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(1,996)
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14.03
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Balance at March 31, 2018
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1,868,521
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12.30
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Exercisable options at March 31, 2018
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1,665,674
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12.30
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4.8
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Vested and expected to vest at March 31, 2018
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1,868,521
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12.30
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5.0
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The following table summarizes information about stock options outstanding and exercisable at March 31, 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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6.08
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669,446
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3.3
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660,753
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3.3
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$
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8.16
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-
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12.93
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10.57
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418,169
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5.8
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309,182
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5.5
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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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359,537
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6.6
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274,370
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6.5
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$
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20.91
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-
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22.92
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21.07
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421,369
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5.7
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421,369
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5.7
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1,868,521
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1,665,674
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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 Three Months Ended
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and as of March 31,
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2018
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2017
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Options Exercised
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$
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2,765
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$
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3,119
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Options Exercisable
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15,335
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14,761
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Options Vested and Expected to Vest
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17,203
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16,121
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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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326,150
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29.21
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Vested
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(425,282)
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9.83
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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 March 31, 2018
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1,157,278
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15.21
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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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March 31,
|
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2018
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2017
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Cost of revenue
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$
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68
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$
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58
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Research and development
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1,084
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1,129
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Sales and marketing
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959
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1,064
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General and administrative
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1,224
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1,003
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Total stock-based compensation expense
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$
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3,335
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$
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3,254
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