STOCK-BASED COMPENSATION (Tables)
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3 Months Ended |
Mar. 31, 2017 |
| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
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| 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 March 31, 2017: | | | | | | | Shares Available for Grant | | | Balance, December 31, 2016 | 5,116,753 |
| Authorized | 2,612,263 |
| Options granted | — |
| Options canceled | 542,265 |
| Awards granted | (804,691 | ) | Awards canceled | 847,391 |
| Balance, March 31, 2017 | 8,313,981 |
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| 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 | (124,144 | ) | | 1.66 |
| | | | | Options canceled | (542,265 | ) | | 6.95 |
| | | | | Balance, March 31, 2017 | 5,553,365 |
| | $ | 6.17 |
| | 5.96 | | $ | 3,547 |
| Options exercisable, March 31, 2017 | 4,098,387 |
| | $ | 5.84 |
| | 5.15 | | $ | 3,527 |
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| Summary of RSU activity and related information |
summary of the Company’s RSU activity and related information for the three months ended March 31, 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 | 804,691 |
| | 5.00 |
| Awards vested | (481,546 | ) | | 5.87 |
| Awards canceled | (777,023 | ) | | 6.24 |
| Balance, March 31, 2017 | 3,911,792 |
| | $ | 6.03 |
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| Summary of the assumptions related to stock options |
Weighted-average assumptions for the Company's stock options granted were as follows: | | | | | | | Three Months Ended March 31, | | 2017 | | 2016 | Stock options: | | | | Expected term (in years) | N/A | | 5.89 |
| Expected volatility | N/A | | 55.64 | % | Risk free interest rate | N/A | | 1.52 | % |
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| Weighted average assumptions used to value employee stock purchase rights |
Weighted average assumptions used to value employee stock purchase rights under the Black-Scholes model were as follows: | | | | | | Three Months Ended March 31, | | 2017 | | 2016 | ESPP purchase rights: | | | | Expected term (in years) | 0.50 - 1.00 | | 0.50 - 2.00 | Expected volatility | 34% - 39% | | 35% - 55% | Risk free interest rate | 0.60% - 0.82% | | 0.07% - 0.51% |
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| 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 March 31, | | 2017 | | 2016 | | (in thousands) | Cost of revenue | $ | 271 |
| | $ | 272 |
| Research and development | 688 |
| | 1,345 |
| Sales and marketing | 1,294 |
| | 1,768 |
| General and administrative | 1,300 |
| | 1,511 |
| Total stock-based compensation | $ | 3,553 |
| | $ | 4,896 |
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The following table presents stock-based compensation expense by award-type: | | | | | | | | | | Three Months Ended March 31, | | 2017 | | 2016 | | (in thousands) | Stock Options | $ | 883 |
| | $ | 1,146 |
| Restricted Stock Units | 2,270 |
| | 3,147 |
| Employee Stock Purchase Plan | 400 |
| | 603 |
| Total stock-based compensation | $ | 3,553 |
| | $ | 4,896 |
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