Restructuring and Severance (Tables)

9 Months Ended

Sep. 30, 2018

Restructuring And Related Activities [Abstract]

Restructuring and Severance

Restructuring and severance activities during the nine months ended September 30, 2018 and 2017 were as follows (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
Balance at beginning of period	$	—					$	—		$	237
Restructuring expense incurred for the period		223			(49	)		591			(49	)
Payments and non-cash item adjustment during    the period		(223	)		49			(591	)		(188	)
Balance at end of period	$	—		$	—		$	—		$	—