Stock Plans (Tables)
|
12 Months Ended |
Dec. 31, 2017 |
|---|
| Schedule of Fair Value Assumptions |
The assumptions used in calculating the fair values of options
granted during the years ended December 31, 2017 and 2016 are
set forth in the table below:
|
|
|
|
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| |
|
Year Ended
December 31,
2017
|
|
Year Ended
December 31,
2016
|
|
Expected terms (in years)
|
|
5.83 - 6.31 |
|
5.58 - 6.08 |
|
Expected volatility
|
|
52% -65% |
|
55%% - 60% |
|
Risk-free interest rate
|
|
1.79% - 2.20% |
|
1.30% - 1.72% |
|
Expected dividend yield
|
|
— |
|
— |
|
| Schedule of Stock-based Compensation Expense |
The stock-based compensation expense by type of award and by
operating expense grouping are presented below:
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|
|
|
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| |
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Year Ended
December 31, |
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| |
|
2017 |
|
|
2016 |
|
|
Stock-based compensation expense by type of award:
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|
|
|
|
|
|
|
|
Restricted stock
|
|
$ |
891 |
|
|
$ |
151 |
|
|
Common stock awards
|
|
|
375 |
|
|
|
1,442 |
|
|
Restricted stock units
|
|
|
327 |
|
|
|
— |
|
|
Stock options
|
|
|
14,391 |
|
|
|
137 |
|
|
Employee stock purchase plan
|
|
|
105 |
|
|
|
— |
|
|
|
|
|
|
|
|
|
|
|
Total
|
|
$ |
16,089 |
|
|
$ |
1,730 |
|
|
|
|
|
|
|
|
|
|
|
Stock-based compensation expense by operating expense grouping:
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|
|
|
|
|
|
|
|
Sales and marketing
|
|
$ |
438 |
|
|
$ |
71 |
|
|
Research and development
|
|
|
464 |
|
|
|
31 |
|
|
General and administrative
|
|
|
15,187 |
|
|
|
1,628 |
|
|
|
|
|
|
|
|
|
|
|
Total
|
|
$ |
16,089 |
|
|
$ |
1,730 |
|
|
|
|
|
|
|
|
|
|
|
| Schedule of Restricted Stock Activity |
The Company’s restricted stock activity for the year ended
December 31, 2017 was as follows:
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| |
|
Shares |
|
|
Weighted
Average Grant
Date Fair Value |
|
| Unvested at December 31, 2016 |
|
|
208,886 |
|
|
$ |
4.80 |
|
| Granted |
|
|
64,240 |
|
|
$ |
15.47 |
|
| Forfeited |
|
|
(22,241) |
|
|
$ |
8.42 |
|
| Vested |
|
|
(103,429) |
|
|
$ |
8.50 |
|
|
|
|
|
|
|
|
|
|
| Unvested at December 31, 2017 |
|
|
147,456 |
|
|
$ |
6.30 |
|
|
|
|
|
|
|
|
|
|
|
| Schedule of Stock Option Activity |
The Company’s stock option activity for the year ended
December 31, 2017 was as follows:
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|
|
|
|
|
|
|
|
|
| |
|
No. of
Options |
|
|
Weighted
Average
Exercise
Price
|
|
|
Weighted
Average
Remaining
Contractual
Term
(Years) |
|
|
Aggregate
Intrinsic
Value |
|
|
Outstanding at December 31, 2016
|
|
|
680,434 |
|
|
$ |
2.27 |
|
|
|
8.49 |
|
|
$ |
3,031 |
|
|
Options Granted
|
|
|
4,383,208 |
|
|
$ |
15.27 |
|
|
|
|
|
|
|
|
|
|
Options Exercised
|
|
|
(80,829 |
) |
|
$ |
1.62 |
|
|
|
|
|
|
|
|
|
|
Options Forfeited
|
|
|
(161,346 |
) |
|
$ |
9.90 |
|
|
|
|
|
|
|
|
|
|
Options Expired
|
|
|
(18,873 |
) |
|
$ |
1.50 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
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|
| Outstanding at December 31, 2017 |
|
|
4,802,594 |
|
|
$ |
13.89 |
|
|
|
9.17 |
|
|
|
$44,712 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
| Exercisable at December 31, 2017 |
|
|
1,805,482 |
|
|
$ |
12.44 |
|
|
|
8.85 |
|
|
|
$19,433 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Vested and expected to vest at December 31,
2017 |
|
|
4,715,202 |
|
|
$ |
13.87 |
|
|
|
9.17 |
|
|
|
$43,994 |
|
|
|
|
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| Employee Stock Purchase Plan [Member] |
|
| Schedule of Fair Value Assumptions |
The assumptions used in calculating the fair values of purchase
rights granted under the ESPP during the year ended
December 31, 2017 are set forth in the table below:
|
|
|
| |
|
Year Ended
December 31,
2017
|
|
Expected term (in years)
|
|
0.50 |
|
Expected volatility
|
|
53% |
|
Risk-free interest rate
|
|
1.15% |
|
Expected dividend yield
|
|
— |
|
| Restricted Stock Units [Member] |
|
| Schedule of Restricted Stock Activity |
The Company’s restricted stock units activity for the year
ended December 31, 2017 was as follows:
|
|
|
|
|
|
|
| |
|
Shares |
|
Weighted
Average Grant
Date Fair Value |
|
| Unvested at December 31, 2016 |
|
— |
|
$ |
— |
|
| Granted |
|
35,576 |
|
$ |
14.76 |
|
| Forfeited |
|
— |
|
$ |
— |
|
| Vested |
|
— |
|
$ |
— |
|
|
|
|
|
|
|
|
| Unvested at December 31, 2017 |
|
35,576 |
|
$ |
14.76 |
|
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