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Stock Based Compensation (Tables) | 9 Months Ended | 12 Months Ended
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Sep. 30, 2024 | Dec. 31, 2023
Share-Based Payment Arrangement [Abstract] |  |
Schedule of Stock-based Compensation Expense | Stock-based compensation expense included in the condensed consolidated statement of operations was as follows:
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2024 |  |  | 2023 |  |  | 2024 |  |  | 2023 |
Cost of revenue |  | $ | 13 |  |  | $ | 16 |  |  | $ | 24 |  |  | $ | 31 |
Selling, general and administrative |  |  | 791 |  |  |  | 5,477 |  |  |  | 2,109 |  |  |  | 6,235 |
Research and development |  |  | 56 |  |  |  | 46 |  |  |  | 84 |  |  |  | 83 |
Total stock-based compensation expense |  | $ | 860 |  |  | $ | 5,539 |  |  | $ | 2,217 |  |  | $ | 6,349 |
| Stock-based compensation expense included in the consolidated statement of operations and comprehensive loss was as follows:
|  | Year Ended December 31, |
|  | 2023 |  |  | 2022 |
Cost of revenue |  | $ | 32 |  |  | $ | — |
Selling, general, and administrative |  |  | 8,198 |  |  |  | 400 |
Research and development |  |  | 127 |  |  |  | 37 |
Total stock-based compensation expense |  | $ | 8,357 |  |  | $ | 437 |
Summary of Option Activity Under the Plan | The following table summarizes the option activity under the 2010 Plan, 2020 Plan, and the 2023 Plan during the nine months ended September 30, 2024:
|  | Number of Options |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term |  |  | Aggregate Intrinsic Value |
|  |  |  |  | (per option) |  |  | (in years) |  |  | (in thousands) |
Outstanding—January 1, 2024 |  |  | 3,886,038 |  |  | $ | 2.67 |  |  |  | 6.9 |  |  | $ | 5,565 |
Granted |  |  | 3,686,059 |  |  |  | 1.86 |  |  |  |  |  |  |  |  |
Cancellations and forfeitures |  |  | (447,644 | ) |  |  | 2.28 |  |  |  |  |  |  |  |  |
Exercised |  |  | (16,137 | ) |  |  | 1.37 |  |  |  |  |  |  |  |  |
Outstanding—September 30, 2024 |  |  | 7,108,316 |  |  |  | 2.28 |  |  |  | 7.9 |  |  |  | — |
Exercisable at September 30, 2024 |  |  | 2,872,814 |  |  | $ | 2.48 |  |  |  | 5.9 |  |  | $ | — |
| The following tables summarizes the option activity under the 2010 Plan, 2020 Plan, and the 2023 Plan during the year ended December 31, 2023:
|  | Number of Options |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term |  |  | Aggregate Intrinsic Value |
|  |  |  |  | (per option) |  |  | (in years) |  |  | (in thousands) |
Outstanding—January 1, 2023 |  |  | 4,301,968 |  |  | $ | 2.35 |  |  |  | 7.7 |  |  | $ | 9,437 |
Granted |  |  | 257,683 |  |  | $ | 5.41 |  |  |  |  |  |  |  |  |
Cancellations and forfeitures |  |  | (375,051 | ) |  | $ | 2.00 |  |  |  |  |  |  |  |  |
Exercised |  |  | (298,562 | ) |  | $ | 1.15 |  |  |  |  |  |  |  |  |
Outstanding—December 31, 2023 |  |  | 3,886,038 |  |  | $ | 2.67 |  |  |  | 6.9 |  |  | $ | 5,565 |
Exercisable at December 31, 2023 |  |  | 2,735,884 |  |  | $ | 2.23 |  |  |  | 6.2 |  |  | $ | 4,812 |
Schedule of Assumptions Used in Black-Scholes Option Pricing Model | The assumptions used in the Black Scholes option-pricing model for the nine months ended September 30, 2024 and 2023 are as follows:
|  | Nine Months Ended September 30, |
|  | 2024 |  |  | 2023 |
Expected volatility |  |  | 71 | % |  |  | 86 | %
Risk-free interest rate |  |  | 4.36 | % |  |  | 4.50 | %
Expected dividend yield |  |  | 0 | % |  |  | 0 | %
Expected term (in years) |  |  | 6.1 |  |  |  | 5.8 |
| The assumptions used in the Black-Scholes option-pricing model are as follows:
|  | Year Ended December 31, |
|  | 2023 |  |  | 2022 |
Expected volatility |  |  | 85.8 | % |  |  | 63 | %
Risk-free interest rate |  |  | 4.5 | % |  |  | 3.56 | %
Expected dividend yield |  |  | — | % |  |  | — | %
Expected term (in years) |  |  | 5.8 |  |  |  | 5.8 |
Summary of Restricted Stock Unit Activity Under the Plan | The following table summarizes the restricted stock unit activity under the 2020 Plan and 2023 Plan during the three months ended September 30, 2024:
|  | Number of RSUs |  |  | Weighted Average Grant Date Fair Value |
|  |  |  |  | (per share) |
Outstanding—January 1, 2024 |  |  | 643,635 |  |  | $ | 4.45 |
Granted |  |  | 75,000 |  |  |  | 2.61 |
Cancellations and forfeitures |  |  | — |  |  |  |  |
Vested |  |  | (187,857 | ) |  |  | 4.51 |
Outstanding—September 30, 2024 |  |  | 530,778 |  |  | $ | 4.16 |
| The following table summarizes the restricted stock unit activity under the 2020 Plan and 2023 Plan during the year ended December 31, 2023:
|  | Number of RSUs |  |  | Weighted Average Grant Date Fair Value |
|  |  |  |  | (per share) |
Outstanding—January 1, 2023 |  |  | 1,415,104 |  |  | $ | 4.51 |
Granted |  |  | 226,175 |  |  |  | 4.32 |
Cancellations and forfeitures |  |  | (79,232 | ) |  |  | 4.51 |
Vested |  |  | (918,412 | ) |  |  | 4.51 |
Outstanding—December 31, 2023 |  |  | 643,635 |  |  |  | 4.45 |

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