Equity Compensation (Expense) (Details) - USD ($)
$ in Thousands |
3 Months Ended |
Mar. 31, 2019 |
Mar. 31, 2018 |
| Stock options |
|
|
| Total stock-based compensation expense |
|
|
| Total stock-based compensation expense |
$ 3,529
|
$ 3,335
|
| Total unrecognized compensation cost related to non-vested stock option awards |
$ 600
|
|
| Weighted-average period over which unrecognized compensation cost will be recognized |
3 months 18 days
|
|
| Stock options | Cost of revenue |
|
|
| Total stock-based compensation expense |
|
|
| Total stock-based compensation expense |
$ 78
|
68
|
| Stock options | Research and development |
|
|
| Total stock-based compensation expense |
|
|
| Total stock-based compensation expense |
1,287
|
1,084
|
| Stock options | Sales and marketing |
|
|
| Total stock-based compensation expense |
|
|
| Total stock-based compensation expense |
870
|
959
|
| Stock options | General and administrative |
|
|
| Total stock-based compensation expense |
|
|
| Total stock-based compensation expense |
1,294
|
$ 1,224
|
| Restricted stock units |
|
|
| Total stock-based compensation expense |
|
|
| Total unrecognized compensation cost related to non-vested restricted stock units |
$ 18,000
|
|
| Weighted-average period over which unrecognized compensation cost will be recognized |
2 years 3 months 18 days
|
|