Accrued and Other Current Liabilities (Tables)

3 Months Ended

Mar. 31, 2018

Payables And Accruals [Abstract]

Schedule of Accrued and Other Current Liabilities

	December 31,		March 31,
	2017		2018
	(In thousands)
Employee benefits	$	8,269	$	4,965
Professional fees		350		726
Other		1,088		1,399
Total	$	9,707	$	7,090