Accrued Expenses

6 Months Ended

Jun. 30, 2018

Payables And Accruals [Abstract]

Accrued Expenses

6. Accrued Expenses

Accrued expenses are as follows:

	June 30, 2018		December 31, 2017
	(in thousands)
Accrued clinical expenses	$	65,968	$	43,297
Merger costs		5,107		—
Accrued bonus		2,305		3,388
Professional fees		1,104		808
Accrued vacation		940		797
Accrued payroll		840		795
Accrued severance		240		—
Income tax payable		—		987
Accrued other		4,508		2,369
Total accrued expenses	$	81,012	$	52,441