Defined Benefit Plans (Tables)

6 Months Ended

Jun. 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 June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Service cost	$	309		$	245		$	630		$	486
Cost recognized as a component of compensation cost	309			245			630			486
Interest cost	58			57			118			114
Expected return on plan assets	(322		)	(252		)	(656		)	(499		)
Prior service cost amortization	24			39			48			75
Net cost recognized in other components of defined benefit plans, net	(240		)	(156		)	(490		)	(310		)
Net pension cost	$	69		$	89		$	140		$	176

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 June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Service cost	$	150	$	88	$	301	$	88
Cost recognized as a component of compensation cost	150		88		301		88
Interest cost	29		13		58		13
Cost recognized in other components of defined benefit plans, net	29		13		58		13
Net cost	$	179	$	101	$	359	$	101