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Share-based Compensation | 3 Months Ended
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Mar. 31, 2016
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 March 31,
| 2016 |  | 2015
Cost of revenues | $ | 52 |  |  | $ | 21 |
Research and development | 249 |  |  | 215 |
Sales and marketing | 210 |  |  | 40 |
General and administrative | 555 |  |  | 514 |
Total | $ | 1,066 |  |  | $ | 790 |
Stock Options The following table summarizes the Company’s stock option activity (in thousands):
Outstanding — December 31, 2014 | 3,065 |
Granted | 6,657 |
Exercised | (273 | )
Canceled | (3,364 | )
Outstanding — December 31, 2015 | 6,085 |
Granted | 952 |
Exercised | (1 | )
Canceled | (312 | )
Outstanding — March 31, 2016 | 6,724 |
Exercisable — March 31, 2016 | 1,389 |
Restricted Stock Units The following table summarizes the Company’s restricted stock unit (“RSU”) activity (in thousands):
Non-vested at December 31, 2014 | 1,629 |
Granted | 1,043 |
Vested | (927 | )
Forfeited | (785 | )
Non-vested at December 31, 2015 | 960 |
Granted | 2,914 |
Vested | (279 | )
Forfeited | (25 | )
Non-vested at March 31, 2016 | 3,570 |
Employee Stock Purchase Plan During the three months ended March 31, 2016 and 2015, the Company recognized $0.1 million and $0.1 million, respectively, of stock-based compensation expense related to the employee stock purchase plan.

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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 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=51659978&loc=d3e25284-112666 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 + Details
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