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Stockholders' Equity - Summary of Stock Option Activity (Details) $ / shares in Units, $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2024 USD ($) $ / shares shares | Dec. 31, 2023 USD ($) $ / shares shares
Number of Options |  |
Outstanding, beginning of period (in shares) | shares | 4,183,232 |
Granted (in shares) | shares | 2,213,096 |
Exercised (in shares) | shares | (32,300) |
Expired (in shares) | shares | (46,956) |
Cancelled/Forfeited (in shares) | shares | (184,958) |
Outstanding, end of period (in shares) | shares | 6,132,114 | 4,183,232
Exercisable (in shares) | shares | 2,995,121 |
Unvested at June 30, 2024 (in shares) | shares | 3,136,993 |
Weighted Average Exercise Price Per Share |  |
Outstanding, Weighted Average Exercise Price Per Share, beginning of period (in dollars per share) | $ 8.17 |
Granted, Weighted Average Exercise Price Per Share (in dollars per share) | 5.01 |
Exercised, Weighted Average Exercise Price Per Share (in dollars per share) | 5.22 |
Expired, Weighted Average Exercise Price Per Share (in dollars per share) | 8.63 |
Cancelled/Forfeited, Weighted Average Exercise Price Per Share (in dollars per share) | 5.88 |
Outstanding, Weighted Average Exercise Price Per Share, end of period (in dollars per share) | 7.11 | $ 8.17
Weighted Average Exercise Price, Exercisable (in dollars per share) | 8.95 |
Weighted Average Exercise Price, Unvested (in dollars per share) | 5.36 |
Weighted Average Grant Date Fair Value Per Share |  |
Outstanding, Weighted average grant date fair value at beginning of period (in dollars per share) | 7.60 |
Weighted average estimated fair value of the stock options granted (in dollars per share) | 4.09 |
Exercised, Weighted average grant date fair value (in dollars per share) | 4.15 |
Expired, Weighted average grant date fair value (in dollars per share) | 8.34 |
Expired, Weighted average grant date fair value (in dollars per share) | 5.49 |
Ending, Weighted average grant date fair value at beginning of period (in dollars per share) | 6.41 | $ 7.60
Exercisable, Weighted average grant date fair value (in dollars per share) | 8.17 |
Unvested Weighted average grant date fair value (in dollars per share) | $ 4.73 |
Weighted Average Remaining Contractual Term (in years) and Aggregate Intrinsic Value |  |
Weighted Average Remaining Contractual Term (in years), Outstanding | 8 years 4 months 24 days | 8 years 3 months 18 days
Weighted Average Remaining Contractual Term (in years), Granted | 9 years 6 months |
Weighted Average Remaining Contractual Term (in years), Exercisable | 7 years 4 months 24 days |
Weighted Average Remaining Contractual Term (in years), Unvested | 9 years 3 months 18 days |
Aggregate Intrinsic Value, Outstanding | $ | $ 12,902 | $ 147
Aggregate Intrinsic Value, Exercised | $ | 60 |
Aggregate Intrinsic Value, Exercisable | $ | 3,443 |
Aggregate Intrinsic Value, Unvested | $ | $ 9,459 |

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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