Accrued expenses and other current liabilities

9 Months Ended

Sep. 30, 2021

Payables and Accruals [Abstract]

Accrued expenses and other current liabilities

Accrued expenses and other current liabilitiesAccrued expenses and other current liabilities consist of the following (in thousands):

	As of September 30, 2021		As of December 31, 2020
Employee compensation	$	95,505	$	55,802
Manufacturing costs	21,809		22,571
Clinical and contract research organization costs	19,017		23,766
Collaboration costs	28,031		20,004
Property, plant and equipment	618		789
License and milestone fees	467		278
Professional fees	2,549		1,541
Other	35,794		20,655
Accrued expenses and other current liabilities	$	203,790	$	145,406

Accrued employee compensation includes severance costs associated with the Company's orderly wind down of its European operations. As of September 30, 2021, the Company had accrued expenses of $19.7 million related to these restructuring costs. Please refer to Note 16, Reduction in Workforce, for further discussion.