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Stock-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2019
Share-based Payment Arrangement [Abstract] |
Schedule of Stock-Based Compensation Expense | Stock-based compensation expense is included in the following line items in the condensed consolidated statements of operations (in thousands):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Sales and marketing | $ | 534 |  |  | $ | 301 |  |  | $ | 1,385 |  |  | $ | 855 |
General and administrative | 1,714 |  |  | 1,191 |  |  | 4,762 |  |  | 3,700 |
Research and development | 2,787 |  |  | 1,965 |  |  | 8,574 |  |  | 5,115 |
Total stock-based compensation expense | $ | 5,035 |  |  | $ | 3,457 |  |  | $ | 14,721 |  |  | $ | 9,670 |
The following table summarizes the components of non-cash stock-based compensation expense (in thousands):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Stock options and assumed options | $ | 941 |  |  | $ | 850 |  |  | $ | 2,836 |  |  | $ | 2,666 |
Restricted stock units | 4,046 |  |  | 2,585 |  |  | 11,746 |  |  | 6,900 |
Restricted stock awards | — |  |  | — |  |  | — |  |  | 1 |
Employee stock purchase plan | 48 |  |  | 22 |  |  | 139 |  |  | 103 |
Total stock-based compensation expense | $ | 5,035 |  |  | $ | 3,457 |  |  | $ | 14,721 |  |  | $ | 9,670 |
Tax benefit from stock-based awards | $ | 565 |  |  | $ | 2,958 |  |  | $ | 4,050 |  |  | $ | 6,899 |

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- Definition Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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