Accrued Expenses (Tables)

6 Months Ended

Jun. 30, 2018

Payables And Accruals [Abstract]

Schedule of Accrued Expenses

Accrued expenses consisted of the following:  

	June 30,		December 31,
	2018		2017
	(In thousands)
Research and development and professional expenses	$	5,215	$	3,226
Employee compensation and benefits		3,941		4,773
Accrued expenses	$	9,156	$	7,999