Restricted cash (Tables)

12 Months Ended

Dec. 31, 2021

Other Assets, Noncurrent [Abstract]

Schedule of collateralized bank account of financial institution

Total restricted cash as of December 31, 2021 and 2020 consisted of the following (in thousands):

	As of December 31,
	2021		2020
50 Binney Street lease	$	40,072	$	40,072
Assembly Row lease	2,753		—
60 Binney Street lease	—		13,763
Other	2,675		2,188
Total restricted cash	$	45,500	$	56,023