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Stock-Based Compensation | 3 Months Ended
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Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Stock-Based Compensation | Note 8—Stock-Based Compensation Stock-Based Compensation Expense Total stock-based compensation expense, by operating expense category, in the condensed consolidated statements of operations was as follows (in thousands):
|  | Three Months Ended March 31, |
|  | 2017 |  |  | 2016 |
Platform operations |  | $ | 229 |  |  | $ | 15 |
Sales and marketing |  |  | 539 |  |  |  | 50 |
Technology and development |  |  | 665 |  |  |  | 40 |
General and administrative |  |  | 889 |  |  |  | 54 |
Total |  | $ | 2,322 |  |  | $ | 159 |
Stock Options Stock option activity for the three months ended March 31, 2017 was as follows:
|  | Shares Under Option (in thousands) |  |  | Weighted- Average Exercise Price |
Outstanding at December 31, 2016(1) |  |  | 5,429 |  |  | $ | 4.94 |
Granted |  |  | 44 |  |  |  | 29.60 |
Exercised |  |  | (680 | ) |  |  | 0.40 |
Cancelled |  |  | (126 | ) |  |  | 20.10 |
Outstanding as of March 31, 2017(2) |  |  | 4,667 |  |  | $ | 5.43 |
Exercisable as of March 31, 2017 |  |  | 2,710 |  |  | $ | 1.13 |
| (1) | Includes options to purchase 389 and 5,040 shares of Class A and Class B common stock, respectively.
| (2) | Includes options to purchase 393 and 4,274 shares of Class A and Class B common stock, respectively.
On January 1, 2017, the number of shares authorized for grant under the Company’s 2016 Incentive Award Plan was increased by 1.6 million shares in accordance with plan provisions. Employee Stock Purchase Plan On January 1, 2017, the number of shares available for issuance under the Company’s Employee Stock Purchase Plan was increased by 0.4 million shares in accordance with plan provisions.

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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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