Severance and Other Charges (Tables)

9 Months Ended

Sep. 30, 2018

Restructuring and Related Activities [Abstract]

Schedule of severance and other charges

Severance and other charges consist of employee severance expense and lease exit costs, and the following summarizes the activity (in thousands):

	Severance			Lease Exit Costs		Total
December 31, 2017	$	28		$	—	$	28
Provision	—			—		—
Payments	(28		)	—		(28		)
September 30, 2018	$	—		$	—	$	—

	Severance			Lease Exit Costs			Total
December 31, 2016	$	718		$	1,020		$	1,738
Provision	235			(619		)	(384		)
Payments	(576		)	(386		)	(962		)
September 30, 2017	$	377		$	15		$	392