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SHARE-BASED COMPENSATION | 9 Months Ended
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Sep. 30, 2023
Share-Based Payment Arrangement [Abstract] |
SHARE-BASED COMPENSATION | 8. SHARE-BASED COMPENSATION We issue share-based compensation to employees in the form of stock options, restricted stock units (RSUs), and performance stock units (PSUs). We account for the share-based awards by recognizing the fair value of share-based compensation expense on a straight-line basis over the service period of the award, net of estimated forfeitures. The fair value of stock options is estimated on the grant date using the Black-Scholes option pricing model. The fair value of RSUs and non-executive PSUs is determined by the closing price of our common stock on the grant date or the period end date for the awards that are being measured by the service inception date. Changes in estimated inputs or using other option valuation methods may result in materially different option values and share-based compensation expense. The following table summarizes the amount of share-based compensation expense by line item on the statements of operations: SCHEDULE OF SHARE-BASED COMPENSATION EXPENSE
(in thousands) |  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Share-based compensation expense |  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
(in thousands) |  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Research and development expense |  | $ | 2,194 |  |  | $ | 1,831 |  |  | $ | 4,438 |  |  | $ | 5,681 |
Sales, marketing, general and administrative expense |  |  | 2,497 |  |  |  | 2,250 |  |  |  | 7,068 |  |  |  | 6,254 |
Total Share-based compensation expense |  | $ | 4,691 |  |  | $ | 4,081 |  |  | $ | 11,506 |  |  | $ | 11,935 |
Options activity and positions The following table summarizes shares, weighted-average exercise price, weighted-average remaining contractual term and aggregate intrinsic value of options outstanding and options exercisable as of September 30, 2023: SCHEDULE OF VALUATION ASSUMPTIONS FOR WEIGHTED-AVERAGE GRANT
|  |  |  |  |  |  |  | Weighted- |  |  |  |
|  |  |  |  | Weighted- |  |  | Average |  |  |  |
|  |  |  |  | Average |  |  | Remaining |  |  | Aggregate |
|  |  |  |  | Exercise |  |  | Contractual |  |  | Intrinsic |
Options |  | Shares |  |  | Price |  |  | Term (years) |  |  | Value |
Outstanding as of September 30, 2023 |  |  | 752,000 |  |  | $ | 1.35 |  |  |  | 4.9 |  |  | $ | 746,000 |
Exercisable as of September 30, 2023 |  |  | 752,000 |  |  | $ | 1.35 |  |  |  | 4.9 |  |  | $ | 746,000 |
As of September 30, 2023, there is no unrecognized share-based employee compensation related to stock options. Restricted stock activity and positions The following table summarizes activity and positions with respect to RSUs and PSUs for the nine months ended September 30, 2023: SCHEDULE OF ACTIVITY AND POSITIONS WITH RESPECT TO RSUS AND PSUS
|  |  |  |  | Weighted-average |
|  | Shares |  |  | price |
Unvested as of December 31, 2022 |  |  | 8,866,000 |  |  | $ | 3.85 |
Granted |  |  | 3,254,000 |  |  | $ | 4.02 |
Vested |  |  | (1,374,000 | ) |  | $ | 7.86 |
Forfeited |  |  | (423,000 | ) |  | $ | 8.09 |
Unvested as of September 30, 2023 |  |  | 10,323,000 |  |  | $ | 3.19 |
During the nine months ended September 30, 2023, we issued 2.6 million PSUs to non-executive employees subject to the achievement of development goals. These shares are liabilities subject to mark-to-market accounting as the number of shares was not fixed when issued. One-third of these shares will vest in connection with 2023 achievement of the milestones and the remaining two-thirds will vest over two years from June 30, 2023. During the nine months ended September 30, 2023, we issued 106,000 shares for the partial achievement of internal performance milestones during the fourth quarter of 2022. These shares were valued based on the closing price of our common stock on the dates of grant and vest quarterly over two years. We had canceled 426,000 PSUs in the fourth quarter of 2022 related to the same internal performance milestones. During the nine months ended September 30, 2023, we issued 408,000 time-based RSUs to non-executive employees for promotion, retention, and new hire grants. These shares were valued based on the closing price of our common stock on the dates of grant. These shares vest over three or four years from the date of grant. During the nine months ended September 30, 2023, we issued 275,000 time-based RSUs to independent directors for annual equity compensation. These shares were valued based on the closing price of our common stock on the dates of grant. These shares vest quarterly, with the final installment vesting the earlier of the one year anniversary of the grant date or the day before the next annual meeting. As of September 30, 2023, our unrecognized share-based compensation related to RSUs was $6.6 million, which we plan to expense over the next 1.5 years. Our unrecognized share-based compensation related to the executive PSUs was $5.9 million, which we plan to expense over the next 2.0 years and our unrecognized share-based compensation related to the non-executive PSUs was $4.6 million, which we plan to expense over the next 1.1 years. In June 2022, we issued 6.0 million PSUs to our executive officers. The PSUs are subject to the achievement of performance goals and time-based vesting. The PSUs will become eligible to vest if the closing price of our common stock reaches or exceeds specified price thresholds for at least 20 consecutive trading days during the performance period through December 31, 2025. If the performance goals are met, the portion of the PSUs deemed earned will become subject to time-based vesting in equal quarterly installments over two years starting from the date on which the goal is achieved. These PSUs were valued using a Monte Carlo simulation model using the following inputs: stock price, volatility, and risk-free interest rates. During the nine months ended September 30, 2022, we issued 2.4 million PSUs to non-executive employees subject to the achievement of development goals. These shares were valued based on the closing price of our common stock on the dates of grant. These shares vest quarterly over two years from the achievement of established performance criteria. During the nine months ended September 30, 2022, we issued 511,000 time-based RSUs to non-executive employees for promotion, retention, and new hire grants. These shares were valued based on the closing price of our common stock on the dates of grant. These shares vest over three or four years from the date of grant.

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