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Share-based Compensation | 6 Months Ended
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Jun. 30, 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 June 30, |  | Six Months Ended June 30,
| 2016 |  | 2015 |  | 2016 |  | 2015
Cost of revenues | $ | 55 |  |  | $ | 37 |  |  | $ | 107 |  |  | $ | 58 |
Research and development | 212 |  |  | 187 |  |  | 461 |  |  | 402 |
Sales and marketing | 213 |  |  | 143 |  |  | 423 |  |  | 183 |
General and administrative | 776 |  |  | 816 |  |  | 1,331 |  |  | 1,330 |
Total | $ | 1,256 |  |  | $ | 1,183 |  |  | $ | 2,322 |  |  | $ | 1,973 |
Stock Options The following table summarizes the Company’s stock option activity:
Outstanding — December 31, 2014 | 3,064,880 |
Granted | 6,656,737 |
Exercised | (273,005 | )
Canceled | (3,363,776 | )
Outstanding — December 31, 2015 | 6,084,836 |
Granted | 1,051,550 |
Exercised | (9,568 | )
Canceled | (392,577 | )
Outstanding — June 30, 2016 | 6,734,241 |
Exercisable — June 30, 2016 | 1,554,152 |
At June 30, 2016, total unrecognized compensation expense related to stock options was $6.1 million, which is expected to be recognized over a weighted-average period of 3.04 years. Restricted Stock Units The following table summarizes the Company’s restricted stock unit (“RSU”) activity:
Non-vested at December 31, 2014 | 1,628,179 |
Granted | 1,042,659 |
Vested | (926,308 | )
Forfeited | (784,327 | )
Non-vested at December 31, 2015 | 960,203 |
Granted | 2,914,000 |
Vested | (342,123 | )
Forfeited | (54,028 | )
Non-vested at June 30, 2016 | 3,478,052 |
At June 30, 2016, total unrecognized compensation expense related to RSUs was $5.4 million, which is expected to be recognized over a weighted-average period of 3.17 years. Employee Stock Purchase Plan During the three months ended June 30, 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 (the “ESPP”). During the six months ended June 30, 2016 and 2015, the Company recognized $0.2 million and $0.2 million, respectively, of stock-based compensation expense related to the ESPP.

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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=65895303&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=68057994&loc=d3e25284-112666 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 4: 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 5: 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 6: 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 + Details
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