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STOCKHOLDERS' EQUITY (Tables) | 6 Months Ended
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Jun. 30, 2025
Equity [Abstract] |
Summary of Stock Option Activity | The following table summarizes the changes in the Company’s outstanding stock options for the six months ended June 30, 2025:
|  | Number of Options |
Outstanding at January 1, 2025 |  |  | 18,396,536 |
Granted (1) (2) (3) |  |  | 430,917 |
Exercised |  |  | (74,140 | )
Forfeited / Cancelled / Expired |  |  | (1,736,748 | )
Outstanding at June 30, 2025 |  |  | 17,016,565 |
_____________________________________________ (1) Consists of new hire employee grants of stock options to purchase 111,500 shares of the Company's Class A common stock. The grants vest 25% on the first anniversary date of the grant with the remainder vesting equally over the remaining 36 months, subject to the employee’s continued service to the Company through the applicable vesting dates. (2) Includes the annual equity grants to three of the Company’s nonemployee directors of non-qualified stock options to purchase 79,200 shares of the Company’s Class A common stock, effective as of May 20, 2025, for an aggregate of stock options to purchase 237,600 shares of the Company’s Class A common stock. The grants will vest on the date of the Company's next regular annual stockholders meeting, subject to the directors’ continued service to the Company through the vesting date. The previous chairperson of the Company’s board of directors and one of the nonemployee directors chose to voluntarily forfeit their 2025 annual equity grants. (3) Includes a grant of non-qualified stock options to purchase 81,817 shares of the Company’s Class A common stock granted to Mr. Wolterman, the new chairperson of the Company’s board of directors, effective as of June 5, 2025, which vest on the date of the Company’s next regular annual stockholders meeting, subject to Mr. Wolterman’s continued service to the Company through the vesting date. During the vesting term of the option, Mr. Wolterman will not receive cash compensation for his service as chairperson of the board of directors.
Summary of Restricted Stock Unit Activity | The following table summarizes the changes in the Company’s outstanding RSUs for the six months ended June 30, 2025:
|  | Number of RSUs |
Outstanding at January 1, 2025 |  |  | 138,902 |
Granted (1) |  |  | 2,526,353 |
Vested |  |  | (55,846 | )
Forfeited |  |  | (41,718 | )
Outstanding at June 30, 2025 |  |  | 2,567,691 |
_____________________________________________ (1) Includes new hire grants of 183,520 RSUs, annual employee grants of 1,742,833 RSUs, and grants to executive officers of 600,000 RSUs. The grants will vest 25% approximately on the anniversary date of the grant with the remainder vesting equally over the remaining 12 quarters, subject to the employee’s continued service to the Company through the applicable vesting dates.
Summary of Stock-Based Compensation Expenses by Function | The following table presents details of s tock-based compensation expenses by functional line item noted within the Company's operating expenses:
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Cost of sales |  | $ | 48 |  |  | $ | 24 |  |  | $ | 66 |  |  | $ | 48 |
Research and development |  |  | 367 |  |  |  | 387 |  |  |  | 712 |  |  |  | 724 |
Sales and marketing |  |  | 71 |  |  |  | 47 |  |  |  | 134 |  |  |  | 86 |
General and administrative |  |  | 61 |  |  |  | 716 |  |  |  | 580 |  |  |  | 1,348 |
|  | $ | 547 |  |  | $ | 1,174 |  |  | $ | 1,492 |  |  | $ | 2,206 |

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