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Share-based Compensation | 9 Months Ended
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Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Share-based Compensation | Share-based Compensation The Company included the following amounts for share-based compensation awards in the unaudited condensed consolidated statements of operations (in thousands):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
Cost of revenues | $ | 35 |  |  | $ | 49 |  |  | $ | 130 |  |  | $ | 156 |
Research and development | 225 |  |  | 201 |  |  | 541 |  |  | 662 |
Sales and marketing | 320 |  |  | 170 |  |  | 536 |  |  | 593 |
General and administrative | 214 |  |  | 695 |  |  | 1,566 |  |  | 2,026 |
Restructuring | 169 |  |  | — |  |  | 169 |  |  | — |
Total | $ | 963 |  |  | $ | 1,115 |  |  | $ | 2,942 |  |  | $ | 3,437 |
Stock Options The following table summarizes the Company’s stock option activity:
Outstanding — December 31, 2015 | 6,084,836 |
Granted | 1,051,550 |
Exercised | (78,384 | )
Canceled | (701,799 | )
Outstanding — December 31, 2016 | 6,356,203 |
Granted | 3,877,000 |
Exercised | — |
Canceled | (3,238,251 | )
Outstanding — September 30, 2017 | 6,994,952 |
Exercisable — September 30, 2017 | 2,338,157 |
At September 30, 2017, total unrecognized compensation expense related to stock options was $3.1 million, which is expected to be recognized over a weighted-average period of 1.71 years. Restricted Stock Units The following table summarizes the Company’s restricted stock unit (“RSU”) activity:
Non-vested — December 31, 2015 | 960,203 |
Granted | 2,914,000 |
Vested | (461,866 | )
Forfeited | (436,537 | )
Non-vested — December 31, 2016 | 2,975,800 |
Granted | 1,480,301 |
Vested | (1,162,453 | )
Forfeited | (2,134,777 | )
Non-vested — September 30, 2017 | 1,158,871 |
At September 30, 2017, total unrecognized compensation expense related to RSUs was $1.3 million, which is expected to be recognized over a weighted-average period of 2.65 years.

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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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