Accrued Expenses and Other Current Liabilities (Tables)

3 Months Ended

Mar. 31, 2020

Payables and Accruals [Abstract]

Schedule of Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following:

(in thousands)	As of March 31, 2020		As of December 31, 2019
External research and development expenses	$	22,979	$	20,462
Payroll and related expenses	5,331		12,902
Professional fees	3,153		3,810
Other	771		1,542
Total accrued expenses and other current liabilities	$	32,234	$	38,716