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Share-based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
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,
| 2018 |  | 2017
Cost of revenues | $ | 54 |  |  | $ | 54 |
Research and development | 215 |  |  | 199 |
Sales and marketing | 309 |  |  | 129 |
General and administrative | 564 |  |  | 709 |
Total | $ | 1,142 |  |  | $ | 1,091 |
Summary of Stock Option Activity | The following table summarizes the Company’s stock option activity:
Outstanding — December 31, 2016 | 6,356,203 |
Granted | 3,877,000 |
Exercised | (146,039 | )
Canceled | (3,520,681 | )
Outstanding — December 31, 2017 | 6,566,483 |
Granted | 170,642 |
Exercised | (471,792 | )
Canceled | (322,480 | )
Outstanding — March 31, 2018 | 5,942,853 |
Exercisable — March 31, 2018 | 1,929,868 |
Summary of Restricted Stock Unit Activity | The following table summarizes the Company’s restricted stock unit (“RSU”) activity:
Non-vested — December 31, 2016 | 2,975,800 |
Granted | 1,480,301 |
Vested | (1,193,721 | )
Forfeited | (2,206,403 | )
Non-vested — December 31, 2017 | 1,055,977 |
Granted | 258,863 |
Vested | (179,718 | )
Forfeited | (58,543 | )
Non-vested — March 31, 2018 | 1,076,579 |

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901 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.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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