Equity Compensation (Tables)
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3 Months Ended |
Mar. 31, 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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(441,176)
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8.01
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Expired
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(36,828)
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16.66
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Forfeited
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(15,973)
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16.70
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Balance at March 31, 2017
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3,282,428
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11.94
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Exercisable options at March 31, 2017
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2,678,355
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11.30
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5.4
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Vested and expected to vest at March 31, 2017
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3,282,428
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11.94
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5.8
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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, 2016
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3,776,405
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11.55
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Exercised
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(441,176)
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8.01
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Expired
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(36,828)
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16.66
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Forfeited
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(15,973)
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16.70
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Balance at March 31, 2017
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3,282,428
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11.94
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Exercisable options at March 31, 2017
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2,678,355
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11.30
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5.4
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Vested and expected to vest at March 31, 2017
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3,282,428
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11.94
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5.8
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The following table summarizes information about stock options outstanding and exercisable at March 31, 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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3.38
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-
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6.14
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5.92
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964,352
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4.0
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964,352
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4.0
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$
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6.34
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-
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9.93
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8.57
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627,739
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5.9
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529,726
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5.4
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$
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11.28
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-
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16.97
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13.88
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1,036,951
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6.9
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670,482
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6.6
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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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653,386
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6.7
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513,795
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6.7
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3,282,428
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2,678,355
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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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2017
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2016
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Options Exercised
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$
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3,119
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$
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76
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Options Exercisable
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14,761
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4,698
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Options Vested and Expected to Vest
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16,121
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4,715
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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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734,780
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10.69
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Vested
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(404,412)
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7.33
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Forfeited
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(47,817)
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8.59
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Non-vested balance at March 31, 2017
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1,678,938
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8.98
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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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2017
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2016
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Cost of revenue
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$
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58
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$
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43
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Research and development
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1,129
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814
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Sales and marketing
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1,064
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509
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General and administrative
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1,003
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457
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Total stock-based compensation expense
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$
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3,254
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$
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1,823
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