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Convertible Preferred Stock (Details) $ in Thousands |  |  |  |  |  |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended |
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Sep. 25, 2024 shares | Jul. 03, 2024 shares | Jul. 02, 2024 USD ($) shares | Apr. 08, 2024 shares | Mar. 26, 2024 business_day shares | Feb. 11, 2024 shares | Jan. 12, 2024 shares | Dec. 13, 2023 shares | Dec. 05, 2023 shares | Nov. 15, 2023 USD ($) shares | Nov. 13, 2023 USD ($) shares | Jul. 31, 2024 USD ($) shares | Nov. 30, 2023 USD ($) | Sep. 30, 2024 shares | Jun. 30, 2024 shares | Mar. 31, 2024 shares | Dec. 31, 2023 shares
Preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary equity, shares authorized (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  | 548,375
Obligation to issue stock (in shares) |  |  |  |  |  | 49,570.163 |  | 49,570.162 |  |  | 148,710.488 |  |  |  |  |  |
Convertible preferred stock, shares that did not automatically convert (in shares) |  |  |  | 166,341.592 |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares issued (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  | 0
Preferred stock, shares outstanding (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  | 0
Number of business days | business_day |  |  |  |  | 8 |  |  |  |  |  |  |  |  |  |  |  |
Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock upon exercise of warrants and Conversion of Series A Preferred Stock to common stock (in shares) |  |  |  |  | 65,681 |  |  |  |  |  |  |  |  |  |  |  |
Securities Purchase Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, number of shares issued in transaction (in shares) |  |  |  |  |  |  |  |  |  |  | 149,330.115 |  |  |  |  |  |
Sale of stock, consideration received on transaction | $ |  |  |  |  |  |  |  |  |  |  | $ 60,250 |  |  |  |  |  |
Securities Purchase Agreement | Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, number of shares issued in transaction (in shares) |  |  |  |  |  |  |  |  |  |  | 149,330.115 |  |  |  |  |  |
Sale of stock, consideration received on transaction | $ |  |  |  |  |  |  |  |  |  |  | $ 60,250 |  |  |  |  |  |
July 2024 Purchase Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, consideration received on transaction | $ |  |  |  |  |  |  |  |  |  |  |  | $ 82,800 |  |  |  |  |
July 2024 Purchase Agreement | Dr. Timothy A. Springer | Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, number of shares issued in transaction (in shares) |  |  |  |  |  |  |  |  |  |  |  | 1,636,832 |  |  |  |  |
Sale of stock, consideration received on transaction | $ |  |  | $ 32,737 |  |  |  |  |  |  |  |  |  |  |  |  |  |
July 2024 Purchase Agreement | TAS Partners LLC | Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, number of shares issued in transaction (in shares) |  |  |  |  |  |  |  |  |  |  |  | 721,361 |  |  |  |  |
Sale of stock, consideration received on transaction | $ |  |  | 14,427 |  |  |  |  |  |  |  |  |  |  |  |  |  |
July 2024 Purchase Agreement | Dr. Chafen Lu | Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, number of shares issued in transaction (in shares) |  |  |  |  |  |  |  |  |  |  |  | 1,307 |  |  |  |  |
Sale of stock, consideration received on transaction | $ |  |  | $ 26 |  |  |  |  |  |  |  |  |  |  |  |  |  |
July 2024 Purchase Agreement, Tranche One |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, consideration received on transaction | $ |  |  |  |  |  |  |  |  |  |  |  | $ 47,200 |  |  |  |  |
November 2023 Private Placement, Tranche One |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, number of shares issued in transaction (in shares) |  |  |  |  |  |  |  | 24,785.081 |  |  |  |  |  |  |  |  |
Sale of stock, consideration received on transaction | $ |  |  |  |  |  |  |  |  |  |  |  |  | $ 10,000 |  |  |  |
Sale of stock, settlement term |  |  |  |  |  |  |  |  |  |  |  |  | 30 days |  |  |  |
November 2023 Private Placement, Tranche Three |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, number of shares issued in transaction (in shares) |  |  |  |  |  | 49,570.163 |  |  |  |  |  |  |  |  |  |  |
Sale of stock, consideration received on transaction | $ |  |  |  |  |  |  |  |  |  |  |  |  | $ 20,000 |  |  |  |
Sale of stock, settlement term |  |  |  |  |  |  |  |  |  |  |  |  | 90 days |  |  |  |
November 2023 Private Placement, Tranche Two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, number of shares issued in transaction (in shares) |  |  |  |  |  |  | 49,570.163 |  |  |  |  |  |  |  |  |  |
Sale of stock, consideration received on transaction | $ |  |  |  |  |  |  |  |  |  |  |  |  | $ 20,000 |  |  |  |
Sale of stock, settlement term |  |  |  |  |  |  |  |  |  |  |  |  | 60 days |  |  |  |
November 2023 Private Placement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, number of shares issued in transaction (in shares) |  |  |  |  |  |  |  |  |  | 619.627 | 149,330.115 |  |  |  |  |  |
Sale of stock, consideration received on transaction | $ |  |  |  |  |  |  |  |  |  | $ 250 |  |  |  |  |  |  |
November 2023 Private Placement | Dr. Timothy A. Springer | Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, number of shares issued in transaction (in shares) |  |  |  |  |  |  |  |  |  |  | 99,140.326 |  |  |  |  |  |
Sale of stock, consideration received on transaction | $ |  |  |  |  |  |  |  |  |  |  | $ 40,000 |  |  |  |  |  |
Common stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock upon exercise of warrants and Conversion of Series A Preferred Stock to common stock (in shares) | 2,499,976 |  |  | 12,263,951 |  |  |  |  |  |  |  |  |  | 2,499,976 | 12,263,951 | 65,681 |
Common stock | Securities Purchase Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, number of shares issued in transaction (in shares) |  | 3,563,247 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock | July 2024 Purchase Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, number of shares issued in transaction (in shares) |  |  |  |  |  |  |  |  |  |  |  | 3,563,247 |  |  |  |  |
Series B Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary equity, shares authorized (in shares) |  |  | 2,937,903 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible preferred stock (in shares) |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock upon exercise of warrants and Conversion of Series A Preferred Stock to common stock (in shares) | (2,499,976) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible preferred stock, shares that did not automatically convert (in shares) | 437,927 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares issued (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  | 437,927 |  |  | 0
Preferred stock, shares outstanding (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  | 437,927 |  |  | 0
Convertible preferred stock, common stock issuable upon conversion (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  | 437,927 |  |  |
Series B Preferred Stock | Securities Purchase Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, number of shares issued in transaction (in shares) |  |  | 2,937,903 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, consideration received on transaction | $ |  |  | $ 130,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series B Preferred Stock | July 2024 Purchase Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, number of shares issued in transaction (in shares) |  |  | 2,937,903 |  |  |  |  |  |  |  |  | 578,403 |  |  |  |  |
Series A Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary equity, shares authorized (in shares) |  |  |  |  |  |  |  |  |  |  | 548,375 |  |  |  |  |  |
Convertible preferred stock (in shares) |  |  |  |  | 33.333 |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock upon exercise of warrants and Conversion of Series A Preferred Stock to common stock (in shares) |  |  |  | 367,919.247 |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares issued (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  | 166,341.592 |  |  | 0
Preferred stock, shares outstanding (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  | 166,341.592 |  |  | 0
Convertible preferred stock, common stock issuable upon conversion (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,544,719 |  |  |
Series A Preferred Stock | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beneficial ownership limitation percentage for conversion of common stock issued and outstanding |  |  |  |  | 0.00% |  |  |  |  |  |  |  |  |  |  |  |
Series A Preferred Stock | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beneficial ownership limitation percentage for conversion of common stock issued and outstanding |  |  |  |  | 19.90% |  |  |  |  |  |  |  |  |  |  |  |
Series A Preferred Stock | Old Cartesian | Preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of shares (in shares) |  |  |  |  |  |  |  |  | 384,930.724 |  | 384,930.724 |  |  |  |  |  |

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- Definition The maximum number of securities classified as temporary equity that are permitted to be issued by an entity's charter and bylaws. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(27)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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