v3.7.0.1

STOCK-BASED COMPENSATION (Tables) | 6 Months Ended
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Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary of total shares available for grant | The following table summarizes the total number of shares available for grant under the 2014 Plan as of June 30, 2017:
| Shares Available for Grant
Balance, December 31, 2016 | 5,116,753 |
Authorized | 2,612,263 |
Options granted | — |
Options canceled | 905,082 |
Awards granted | (3,191,974 | )
Awards canceled | 1,203,643 |
Balance, June 30, 2017 | 6,645,767 |
Summary of shares available for grant and outstanding stock option activity | The following table summarizes the information about outstanding stock option activity:
| Options Outstanding
| Number of Shares Underlying Outstanding Options |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term (Years) |  | Aggregate Intrinsic Value
|  |  |  |  |  |  | (in thousands)
Balance, December 31, 2016 | 6,219,774 |  |  | $ | 6.15 |  |  | 6.42 |  | $ | 6,056 |
Options granted | — |  |  | — |  |  |  |  |
Options exercised | (396,865 | ) |  | 1.75 |  |  |  |  |
Options canceled | (905,082 | ) |  | 7.16 |  |  |  |  |
Balance, June 30, 2017 | 4,917,827 |  |  | $ | 6.31 |  |  | 5.85 |  | $ | 3,694 |
Options exercisable, June 30, 2017 | 3,743,487 |  |  | $ | 6.11 |  |  | 5.15 |  | $ | 3,689 |
Summary of RSU activity and related information | summary of the Company’s RSU activity and related information for the three months ended June 30, 2017:
| Restricted Stock Units Outstanding
| Shares |  | Weighted Average Grant Date Fair Value Per Share
Balance, December 31, 2016 | 4,365,670 |  |  | $ | 6.23 |
Awards granted | 3,191,974 |  |  | 4.97 |
Awards vested | (970,734 | ) |  | 5.09 |
Awards canceled | (1,108,066 | ) |  | 6.20 |
Balance, June 30, 2017 | 5,478,844 |  |  | $ | 5.55 |
Summary of the assumptions related to stock options | Weighted-average assumptions for the Company's stock options granted were as follows:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
Stock options: |  |  |  |  |  |  |
Expected term (in years) | N/A |  | 5.77 |  |  | N/A |  | 5.78 |
Expected volatility | N/A |  | 55.11 | % |  | N/A |  | 55.16 | %
Risk free interest rate | N/A |  | 1.50 | % |  | N/A |  | 1.50 | %
Schedule of share based payment award, equity other than options, valuation [Table Text Block] | Weighted-average assumptions to value MBRSUs under the Monte Carlo model were as follows:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
MBRSUs: |  |  |  |  |  |  |
Expected volatility | 46 | % |  | 53 | % |  | 46 | % |  | 53 | %
Risk free interest rate | 1.45 | % |  | 1.07 | % |  | 1.45 | % |  | 1.07 | %
Weighted average assumptions used to value employee stock purchase rights | Weighted-average assumptions to value employee stock purchase rights under the Black-Scholes model were as follows:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
ESPP purchase rights: |  |  |  |  |  |  |
Expected term (in years) | 0.50 - 1.00 |  | 0.50 - 2.00 |  | 0.50 - 1.00 |  | 0.50 - 2.00
Expected volatility | 34% - 39% |  | 35% - 55% |  | 34% - 39% |  | 35% - 55%
Risk free interest rate | 0.60% - 1.07% |  | 0.07% - 0.51% |  | 0.60% - 1.07% |  | 0.07% - 0.51%
Schedule of stock-based awards granted in the consolidated statements of operations | The total stock-based compensation the Company recognized for stock-based awards in the consolidated statements of operations is as follows:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
| (in thousands)
Cost of revenue | $ | 276 |  |  | $ | 321 |  |  | $ | 547 |  |  | $ | 593 |
Research and development | 1,065 |  |  | 1,366 |  |  | 1,753 |  |  | 2,711 |
Sales and marketing | 1,501 |  |  | 2,063 |  |  | 2,795 |  |  | 3,831 |
General and administrative | 1,602 |  |  | 1,704 |  |  | 2,902 |  |  | 3,215 |
Total stock-based compensation | $ | 4,444 |  |  | $ | 5,454 |  |  | $ | 7,997 |  |  | $ | 10,350 |
The following table presents stock-based compensation expense by award-type:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
| (in thousands)
Stock Options | $ | 820 |  |  | $ | 1,185 |  |  | $ | 1,703 |  |  | $ | 2,331 |
Restricted Stock Units | 3,193 |  |  | 3,544 |  |  | 5,463 |  |  | 6,691 |
Employee Stock Purchase Plan | 431 |  |  | 725 |  |  | 831 |  |  | 1,328 |
Total stock-based compensation | $ | 4,444 |  |  | $ | 5,454 |  |  | $ | 7,997 |  |  | $ | 10,350 |

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