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Stock-Based Compensation Expense | 9 Months Ended
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Sep. 30, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Stock-Based Compensation Expense | 10. Stock-Based Compensation Expense The following two tables show stock-based compensation expense by award type and where the stock-based compensation expense is recorded in the Company’s consolidated statements of operations:
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
|  | (in thousands) |  |  | (in thousands) |
Options |  | $ | 1,246 |  |  | $ | 1,372 |  |  | $ | 3,863 |  |  | $ | 4,294 |
RSUs |  |  | 10,521 |  |  |  | 7,045 |  |  |  | 29,680 |  |  |  | 18,296 |
Employee stock purchase plan |  |  | 343 |  |  |  | 278 |  |  |  | 876 |  |  |  | 811 |
Total stock-based compensation expense |  | $ | 12,110 |  |  | $ | 8,695 |  |  | $ | 34,419 |  |  | $ | 23,401 |
Effect of stock-based compensation expense on income by line item:
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
|  | (in thousands) |  |  | (in thousands) |
Cost of revenue, subscription |  | $ | 163 |  |  | $ | 139 |  |  | $ | 455 |  |  | $ | 363 |
Cost of revenue, service |  |  | 591 |  |  |  | 438 |  |  |  | 1,707 |  |  |  | 1,238 |
Research and development |  |  | 3,110 |  |  |  | 2,341 |  |  |  | 9,013 |  |  |  | 6,371 |
Sales and marketing |  |  | 5,015 |  |  |  | 3,473 |  |  |  | 13,889 |  |  |  | 9,368 |
General and administrative |  |  | 3,231 |  |  |  | 2,304 |  |  |  | 9,355 |  |  |  | 6,061 |
Total stock-based compensation expense |  | $ | 12,110 |  |  | $ | 8,695 |  |  | $ | 34,419 |  |  | $ | 23,401 |
Capitalized software development costs excluded from stock-based compensation expense is $414 thousand for the three months ended September 30, 2017, $1.2 million for the nine months ended September 30, 2017, $326 thousand for the three months ended September 30, 2016 and $832 thousand for the nine months ended September 30, 2016.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -URI http://asc.fasb.org/subtopic&trid=2208855 + Details
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