Stockholders' Equity (Tables)
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9 Months Ended |
Sep. 30, 2017 |
Equity [Abstract] |
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Summary of Stock Options Activity |
The activity for stock options under the Company’s stock plans is as follows:
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Remaining
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weighted-
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Weighted-
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average
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Per share
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average
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contractual
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average
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Price per
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exercise
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terms
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intrinsic
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Options
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share
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price
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(in years)
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value
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Outstanding as of December 31, 2016
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2,355,527
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$0.60-$58.95
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$
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28.22
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5.42
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$
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38.95
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Granted
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64,498
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83.30
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83.30
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Exercised
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(395,739
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0.60-56.72
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23.48
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Forfeited
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(63,173
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24.52-58.95
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43.74
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Expired
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(33
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8.70
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8.70
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Outstanding as of September 30, 2017
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1,961,080
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0.60-83.30
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30.49
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4.83
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64.61
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Vested and exercisable as of September 30, 2017
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1,166,512
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0.60-83.30
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22.89
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4.63
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72.21
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Vested and expected to vest as of September 30, 2017
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1,907,844
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$0.60-$83.30
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$
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30.20
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4.82
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$
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64.90
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Summary of Restricted Stock Activity |
Restricted stock activity for the nine months ended September 30, 2017, is summarized below:
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Weighted-
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average grant
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Performance and
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date fair value
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Time-based
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time-based
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Total
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per share
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Unvested restricted stock units as of December 31, 2016
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—
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—
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—
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$
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—
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Granted
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41,100
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13,109
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54,209
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89.64
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Vested
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—
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—
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—
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—
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Forfeited/canceled
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—
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—
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—
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—
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Unvested restricted stock units as of September 30, 2017
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41,100
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13,109
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54,209
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$
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89.64
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Unvested restricted stock awards outstanding as of December 31, 2016
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—
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—
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—
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$
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—
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Granted
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20,789
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20,785
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41,574
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91.52
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Vested
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—
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—
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—
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—
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Forfeited/canceled
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—
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—
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—
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—
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Unvested restricted stock awards outstanding as of September 30, 2017
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20,789
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20,785
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41,574
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$
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91.52
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Unvested and expected to vest restricted stock awards outstanding as of September 30, 2017
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17,024
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17,027
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34,051
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$
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91.52
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Summary of Stock-based Compensation Expense |
Stock-based compensation
Stock-based compensation expense recognized for the three months and nine months ended September 30, 2017 and September 30, 2016 was as follows:
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Three months ended
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Nine months ended
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September 30,
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September 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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Stock-based compensation expense by type of award:
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Stock option plan awards
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$
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2,012
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$
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1,858
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$
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5,811
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$
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5,063
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Restricted stock units and restricted stock awards
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402
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—
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450
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—
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Employee stock purchase plan
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109
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95
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369
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341
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Total stock-based compensation expense
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$
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2,523
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$
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1,953
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$
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6,630
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$
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5,404
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For the three months and nine months ended September 30, 2017 and September 30, 2016, stock-based compensation expense recognized under ASC 718, included in cost of revenues, sales and marketing expense, general and administrative expense, and research and development expense was as follows:
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Three months ended
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Nine months ended
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September 30,
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September 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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205
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$
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175
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$
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608
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$
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454
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Research and development
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260
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223
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733
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561
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Sales and marketing
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407
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318
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1,069
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859
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General and administrative
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1,651
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1,237
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4,220
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3,530
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Total stock-based compensation expense
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$
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2,523
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$
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1,953
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$
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6,630
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$
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5,404
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