Accrued Expenses

3 Months Ended

Mar. 31, 2021

Payables And Accruals [Abstract]

Accrued Expenses

5. Accrued Expenses

Accrued expenses consist of the following (in thousands):  

	As of
	March 31,		December 31,
	2021		2020
Payroll and employee-related costs	$	11,565	$	22,402
Research costs		22,034		21,684
Licensing fees		930		1,401
Professional fees		1,874		1,670
Intellectual property costs		5,229		3,625
Accrued property and equipment		6,869		2,835
Other		1,363		165
Total	$	49,864	$	53,782