Defined Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2018

Defined Benefit Plan [Abstract]

Schedule of Maxwell SA net pension cost

Components of net pension cost are as follows (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
Service cost	$	309		$	251		$	939		$	737
Cost recognized as a component of compensation cost	309			251			939			737
Interest cost	58			59			175			172
Expected return on plan assets	(322		)	(258		)	(978		)	(757		)
Prior service cost amortization	24			38			72			113
Net cost recognized in other components of defined benefit plans, net	(240		)	(161		)	(731		)	(472		)
Net pension cost	$	69		$	90		$	208		$	265

Schedule of Korea defined benefit plan net cost

Components of net cost related to the Korea employee defined benefit plan are as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Service cost	$	145	$	134	$	446	$	221
Cost recognized as a component of compensation cost	145		134		446		221
Interest cost	23		20		82		34
Cost recognized in other components of defined benefit plans, net	23		20		82		34
Net cost	$	168	$	154	$	528	$	255