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Stock-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2023
Share-Based Payment Arrangement [Abstract] |
Summary of Options Granted and Outstanding | The following table summarizes information about these options granted and outstanding:
| Number of Shares Subject to Options Outstanding |  | Weighted- Average Exercise Price Per Share |  | Weighted- Average Remaining Contractual Life (In Years) |  | Aggregate Intrinsic Value (In Thousands)
Outstanding — December 31, 2022 | 8,428,441 |  |  | $ | 3.65 |  |  | 7.7 |  | $ | 115 |
Granted | 612,276 |  |  | 3.79 |  |  |  |  |
Expired | — |  |  | — |  |  |  |  |
Cancelled | (161,374) |  |  | 6.82 |  |  |  |  |
Exercised | (4,094) |  |  | 0.83 |  |  |  |  |
Outstanding — March 31, 2023 | 8,875,249 |  |  | $ | 3.61 |  |  | 7.6 |  | $ | 9,755 |
Vested and expected to vest at March 31, 2023 | 8,497,717 |  |  | $ | 3.57 |  |  | 7.6 |  | $ | 9,630 |
Vested and exercisable at March 31, 2023 | 4,890,492 |  |  | $ | 3.02 |  |  | 6.7 |  | $ | 7,562 |
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity | The following table summarizes information about RSUs granted and outstanding under the 2021 Plan:
| Number of Awards |  | Weighted-Average Grant Date Fair Value
Outstanding — December 31, 2022 | — |  |  | $ | — |
Granted | 347,824 |  |  | 3.79 |
Forfeited | (388) |  |  | 3.80 |
Vested | — |  |  | — |
Outstanding — March 31, 2023 | 347,436 |  |  | $ | 3.79 |
Schedule of Impact of Stock-based Compensation Expense in the Statements of Operations | The following table presents the impact of stock-based compensation expense in the statements of operations for the periods indicated (in thousands):
| Three Months Ended March 31,
| 2023 |  | 2022
Research and development expense | $ | 349 |  |  | $ | 383 |
Sales and marketing expense | 184 |  |  | 313 |
General and administrative expense | 771 |  |  | 526 |
Total employee stock-based compensation | $ | 1,304 |  |  | $ | 1,222 |
Share-Based Payment Arrangement, Nonvested Award, Cost | The information about unrecognized stock-based compensation expense for outstanding unvested stock options and RSUs as of March 31, 2023 was as follows (in thousands, except years):
| Unrecognized Stock-Based Compensation Expense |  | Weighted-Average Period of Recognition (in years)
Stock Options | $ | 10,071 |  |  | 2.4
RSUs | 1,013 |  |  | 3.9
Total unrecognized stock-based compensation expense | $ | 11,084 |  |  |

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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- Definition Tabular disclosure of cost not yet recognized and weighted-average period over which cost is expected to be recognized for nonvested award under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (i) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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