Restructuring and Exit Costs (Tables)

12 Months Ended

Dec. 31, 2018

Restructuring and Related Activities [Abstract]

Restructuring and exit costs

The following table summarizes the changes in the liabilities for each of the 2017 restructuring plans, which are recorded in “accrued employee compensation” in the Company’s condensed consolidated balance sheet for the year ended December 31, 2018 (in thousands):

	February 2017 Plan			September 2017 Plan
	Employee Severance Costs
Restructuring liability as of December 31, 2016	$	—		$	—
Costs incurred	997			1,275
Amounts paid	(855		)	(431		)
Accruals released	(142		)	(27		)
Restructuring liability as of December 31, 2017	—			817
Costs incurred	—			45
Amounts paid	—			(705		)
Accruals released	—			(157		)
Restructuring liability as of December 31, 2018	$	—		$	—