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Related-Party Transactions
 12 Months Ended
Dec. 31, 2024
Related Party Transactions [Abstract]  
Related-Party Transactions Related-Party Transactions
2024 Securities Purchase Agreement
On July 2, 2024, the Company entered into the 2024 Securities Purchase Agreement with the Purchasers. The Purchasers included (i) Dr. Timothy A. Springer, a member of the Company’s Board of Directors; (ii) TAS Partners LLC, an affiliate of Dr. Springer, and (iii) Dr. Chafen Lu, Dr. Springer’s wife (see Note 11). The below issuances and sales to related parties of the Company were made during the year ended December 31, 2024.
NameShares of Series B Preferred Stock purchasedTotal aggregate purchase price
(in thousands)
Timothy A. Springer, Ph.D.1,636,832 $32,737 
TAS Partners LLC, affiliate of Timothy A. Springer, Ph.D.721,361 $14,427 
Chafen Lu, Ph.D., wife of Timothy A. Springer, Ph.D.1,307 $26 
2023 Securities Purchase Agreement
On November 13, 2023, the Company entered into the 2023 Securities Purchase Agreement with (i) Dr. Timothy A. Springer, (ii) TAS Partners LLC, and (iii) Seven One Eight Three Four Irrevocable Trust, a trust associated with Dr. Murat Kalayoglu, in which the Company agreed to issue and sell an aggregate of 149,330.115 shares of Series A Preferred Stock for an aggregate purchase price of $60.25 million (see Note 11). The 2023 Private Placement included a delayed settlement mechanism, and as a result, the below issuances and sales to related parties of the Company were made during the year ended December 31, 2024.
NameShares of Series A Preferred Stock purchasedTotal aggregate purchase price
(in thousands)
Timothy A. Springer, Ph.D.99,140.326 $40,000 
The below issuances and sales to related parties of the Company were made subject to the 2023 Private Placement during the year ended December 31, 2023.
NameShares of Series A Preferred Stock purchasedTotal aggregate purchase price
(in thousands)
Timothy A. Springer, Ph.D.24,785.081 $10,000 
TAS Partners LLC (affiliate of Timothy A. Springer, Ph.D.)24,785.081 $10,000 
Seven One Eight Three Four Irrevocable Trust (affiliate of Murat Kalayoglu, MD, Ph.D.)619.627 $250 
Exercise of Amended 2019 Warrants
On March 26, 2024, TAS Partners LLC exercised 65,681 Amended 2019 Warrants, paid the per-share exercise price of $43.80 in cash for an aggregate exercise price of $2.9 million, and received 65,681 shares of common stock and 1,970,443 CVRs.