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Stock-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2023
Share-Based Payment Arrangement [Abstract] |
Schedule of the performance-based stock options activity |
|  | Options Outstanding |  |  |  |  |  |  |
|  | Number of Shares |  |  | Weighted Average Exercise Price |  |  | Weighted - Average Remaining Contractual Life (Years) |  |  | Aggregate Intrinsic Value (in thousands) |
Balance, January 1, 2023 |  |  | 6,169,180 |  |  | $ | 2.25 |  |  |  | 7.80 |  |  | $ | - |
Options granted |  |  | 3,017,696 |  |  | $ | 1.85 |  |  |  |  |  |  |  |  |
Options exercised |  |  | (44,413 | ) |  | $ | 0.71 |  |  |  |  |  |  |  |  |
Options cancelled/forfeited |  |  | (238,873 | ) |  | $ | 0.78 |  |  |  |  |  |  |  |  |
Balance, March 31, 2023 |  |  | 8,903,590 |  |  | $ | 2.16 |  |  |  | 8.37 |  |  | $ | 2,523 |
Vested and expected to vest, March 31, 2023 |  |  | 8,903,590 |  |  | $ | 2.16 |  |  |  | 8.37 |  |  | $ | 2,523 |
Exercisable – March 31, 2023 |  |  | 3,058,616 |  |  | $ | 1.68 |  |  |  | 6.69 |  |  | $ | 2,189 |
Schedule of the performance-based stock options activity |
|  | Options Outstanding |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Life (Years) |  |  | Aggregate Intrinsic Value |
Balance, January 1, 2023 |  |  | 463,959 |  |  | $ | 1.42 |  |  |  | 8.06 |  |  | $ | - |
Options granted |  |  | 50,000 |  |  | $ | 1.92 |  |  |  | - |  |  | $ | - |
Balance, March 31, 2023 |  |  | 513,959 |  |  | $ | 1.47 |  |  |  | 8.02 |  |  | $ | 337,635 |
Vested and expected to vest, March 31, 2023 |  |  | 513,959 |  |  | $ | 1.47 |  |  |  | 8.02 |  |  | $ | 337,635 |
Exercisable |  |  | 308,959 |  |  | $ | 0.73 |  |  |  | 7.18 |  |  | $ | 337,635 |
Schedule of RSUs activity |
|  | Number of Shares |  |  | Weighted Average Grant date Fair Value |
Unvested restricted stock units at January 1, 2023 |  |  | 2,617,445 |  |  | $ | 0.79 |
Vested |  |  | (625 | ) |  | $ | 3.54 |
Unvested restricted stock units at March 31, 2023 |  |  | 2,616,820 |  |  | $ | 0.79 |
Vested and unreleased |  |  | - |  |  | $ | - |
Outstanding restricted stock units at March 31, 2023 |  |  | 2,616,820 |  |  | $ | 0.79 |
Schedule of stock-based compensation expense |
|  | Three Months Ended March 31 |
|  | 2023 |  |  | 2022 |
Research and development |  | $ | 468 |  |  | $ | 222 |
General and administrative |  |  | 799 |  |  |  | 556 |
Total |  | $ | 1,267 |  |  | $ | 778 |
Schedule of fair value of stock options was estimated using a Black-Scholes option-pricing model |
|  | Three Months Ended March 31, |
|  | 2023 |  |  | 2022 |
Expected term (in years) |  | 5.25 – 6.08 |  |  | 1.00 – 6.08 |
Expected volatility |  | 103.34% – 104.07% |  |  | 63.41% – 88.27% |
Risk-free interest rate |  | 3.45% – 4.25% |  |  | 1.40% – 2.35% |
Expected dividend yield |  | — |  |  | — |

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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 -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 + 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 Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -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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