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Stock-based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2024
Share-Based Payment Arrangement [Abstract] |
Share-Based Payment Arrangement, Option, Activity | A summary of stock option activity for the year ended December 31, 2024 is as follows:
| Number of Options |  | Weighted-Average Exercise Price |  | Weighted-Average Remaining Contractual Term (years) |  | Intrinsic Value (in thousands)
Balance as of December 31, 2023 | 4,909,302 |  | $1.55 |  |  | 5.58 |  | $ | 3,393 |
Granted | — |  | — |  |  |  |
Forfeited | (118,463) |  | 4.13 |  |  |  |  |
Exercised | (1,026,285) |  | 0.92 |  |  |  |  |
Expired | (530,258) |  | 2.68 |  |  |  |  |
Outstanding at December 31, 2024 | 3,234,296 |  | $1.50 |  |  | 4.55 |  | $ | 5,574 |
Exercisable at December 31, 2024 | 3,172,016 |  | $1.42 |  |  | 4.51 |  | $ | 5,532 |
Share-Based Payment Arrangement, Restricted Stock Unit, Activity | A summary of RSU activity for the year ended December 31, 2024 is as follows:
| Number of RSUs |  | Weighted Average Grant-Date Value |  | Intrinsic Value (in thousands)
Outstanding unvested RSUs at December 31, 2023 | 3,229,915 |  | $ | 2.25 |  |  | $ | 5,652 |
Granted during the year | 2,576,383 |  | 1.07 |  |  |
Forfeited during the year | (1,534,865) |  | 2.20 |  |  |
Vested during the year (1) | (1,378,037) |  | 1.89 |  |  |
Outstanding unvested RSUs at December 31, 2024 | 2,893,396 |  | $ | 2.52 |  |  | $ | 8,246 |
(1) The issuance of Class A common stock was deferred, as elected by the grantees, for 264,516 and 121,384 RSUs that vested during the years ended December 31, 2024 and December 31, 2023, respectively.
Share-Based Payment Arrangement, Expensed and Capitalized, Amount | Total employee and non-employee stock-based compensation expense was classified in the Consolidated Statements of Operations and Comprehensive Loss as follows:
| Year Ended December 31,
| 2024 |  | 2023 |  |
Selling, general and administrative | $ | 2,015 |  |  | $ | 3,952 |  |  |
Engineering | 320 |  |  | 2,347 |  |  |
Total | $ | 2,335 |  |  | $ | 6,299 |  |  |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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