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STOCK-BASED COMPENSATION PLANS (Tables) | 3 Months Ended
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Mar. 31, 2020
Share-based Payment Arrangement [Abstract] |
Schedule of activity related to outstanding stock options | The activity related to the Company's outstanding stock options for the three months ended March 31, 2020 was as follows:
| Number of Shares |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term (years) |  | Aggregate Intrinsic Value (in thousands)
Outstanding at January 1, 2020 | 297,124 |  |  | $ | 11.55 |  |  |  |  |
Granted | — |  |  | $ | — |  |  |  |  |
Exercised | (3,014 | ) |  | $ | 1.74 |  |  |  |  |
Forfeited | (1,470 | ) |  | $ | 1.80 |  |  |  |  |
Expired | (4,920 | ) |  | $ | 18.10 |  |  |  |  |
Outstanding at March 31, 2020 | 287,720 |  |  | $ | 11.59 |  |  | 4.33 |  | $ | 109 |
Vested or expected to vest at March 31, 2020 | 285,559 |  |  | $ | 11.66 |  |  | 4.31 |  | $ | 108 |
Exercisable at March 31, 2020 | 260,307 |  |  | $ | 12.58 |  |  | 4.03 |  | $ | 85 |
Schedule of stock options, additional information | Additional information regarding the Company's stock options for the three months ended March 31, 2020 was as follows (in thousands):
Total intrinsic value of stock options exercised | $ | 5 |
Cash received from the exercise of stock options | $ | 5 |
Schedule of activity related to unvested restricted stock grants | The activity related to the Company's RSAs for the three months ended March 31, 2020 was as follows:
| Shares |  | Weighted Average Grant Date Fair Value
Unvested balance at January 1, 2020 | 487,976 |  |  | $ | 6.87 |
Granted | — |  |  | $ | — |
Vested | (89,920 | ) |  | $ | 7.04 |
Forfeited | (4,499 | ) |  | $ | 7.04 |
Unvested balance at March 31, 2020 | 393,557 |  |  | $ | 6.83 |
The activity related to the Company's RSUs for the three months ended March 31, 2020 was as follows:
| Shares |  | Weighted Average Grant Date Fair Value
Unvested balance at January 1, 2020 | 2,790,060 |  |  | $ | 5.11 |
Granted | 4,123,151 |  |  | $ | 2.22 |
Vested | (927,062 | ) |  | $ | 4.81 |
Forfeited | (237,818 | ) |  | $ | 4.69 |
Unvested balance at March 31, 2020 | 5,748,331 |  |  | $ | 3.10 |
Schedule of activity related to performance stock awards | The activity related to the Company's PSUs for the three months ended March 31, 2020 was as follows:
| Shares |  | Weighted Average Grant Date Fair Value
Unvested balance at January 1, 2020 | 1,067,073 |  |  | $ | 5.94 |
Granted | 4,847,500 |  |  | $ | 2.23 |
Vested | (315,866 | ) |  | $ | 5.53 |
Forfeited | (359,777 | ) |  | $ | 5.51 |
Unvested balance at March 31, 2020 | 5,238,930 |  |  | $ | 2.52 |
Schedule of stock-based compensation expenses which are included in condensed consolidated statement of operations | The condensed consolidated statements of operations include stock-based compensation for the three months ended March 31, 2020 and 2019 as follows (in thousands):
| Three months ended
| March 31, 2020 |  | March 31, 2019
Product cost of revenue | $ | 27 |  |  | $ | 14 |
Service cost of revenue | 130 |  |  | 92 |
Research and development | 558 |  |  | 507 |
Sales and marketing | 752 |  |  | 984 |
General and administrative | 1,509 |  |  | 2,542 |
| $ | 2,976 |  |  | $ | 4,139 |

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