Leases (Tables)

6 Months Ended

Jun. 30, 2022

Leases [Abstract]

Components of Operating Lease Costs

The components of operating lease costs were as follows (in thousands):

	FOR THE THREE MONTHS ENDED JUNE 30,						FOR THE SIX MONTHS ENDED JUNE 30,
	2022			2021			2022			2021
Operating lease costs	$	1,240		$	1,209		$	2,480		$	2,418
Short-term lease costs		3			7			7			13
Variable lease costs		672			590			1,314			1,259
Sublease income		(850	)		(348	)		(1,672	)		(704	)
	$	1,065		$	1,458		$	2,129		$	2,986

Summary of Additional Lease Information

Additional lease information is summarized in the following table (in thousands, except lease term and discount rate):

	FOR THE SIX MONTHS ENDED JUNE 30,
	2022			2021
Cash paid for amounts included in the measurement of operating    lease liabilities	$	3,100		$	3,000
Weighted-average remaining lease term - operating leases (years)		7.4			8.4
Weighted-average discount rate - operating leases		10.1	%		10.3	%

Schedule of Undiscounted Cash Flows Used in Calculating the Operating Lease Liabilities and Amounts to be Received under the Sublease

Undiscounted cash flows used in calculating the Company’s operating lease liabilities and amounts to be received under the sublease at 35 CambridgePark Drive and 4 Hartwell Place as of June 30, 2022 are as follows (in thousands):

Fiscal Year	OPERATING LEASE PAYMENTS			SUBLEASE   RECEIPTS		NET OPERATING LEASE PAYMENTS
2022 (remainder of the year)	$	3,134		$	1,628	$	1,506
2023		6,436			1,965		4,471
2024		6,625			965		5,660
2025		6,820			—		6,820
2026		7,020			—		7,020
Thereafter		21,779			—		21,779
Total undiscounted cash flows	$	51,814		$	4,558	$	47,256
Less: Amounts representing interest		(15,561	)
Present value of lease liabilities	$	36,253