Restricted cash

12 Months Ended

Dec. 31, 2023

Other Assets, Noncurrent [Abstract]

Restricted cash

Restricted cash

As of December 31, 2023 and 2022, the Company maintained letters of credit of $51.2 million and $43.9 million, respectively, which are collateralized with bank accounts at financial institutions in accordance with the agreements. Total restricted cash as of December 31, 2023 and 2022 consisted of the following (in thousands):

	As of December 31,
	2023		2022
50 Binney Street lease	$	40,072	$	40,072
Assembly Row lease	2,753		2,753
Embedded lease	7,632		—
Other	2,385		2,614
Total restricted cash	$	52,842	$	45,439

Refer to Note 11, Leases, for further information on the Company's letters of credit. The Company presents the current portion of restricted cash in receivables and other current assets.