Restricted Cash

3 Months Ended

Mar. 31, 2026

Cash and Cash Equivalents [Abstract]

4. Restricted Cash

Restricted cash as of March 31, 2026 was held as collateral for a stand-by letter of credit issued by the Company to its Sublandlord (as defined in Note 12) in connection with the current lease for its principal facilities located at 300 Fifth Avenue, Waltham, Massachusetts. For additional information regarding the Company’s lease, refer to Note 12. Cash, cash equivalents, and restricted cash consisted of the following as of March 31, 2026 and March 31, 2025 (in thousands):


	March 31, 2026		March 31, 2025
Cash and cash equivalents	$	189,163	$	22,429
Restricted cash	107		—
Total cash, cash equivalents, and restricted cash shown in the statements of cash flows	$	189,270	$	22,429