Defined Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2019

Defined Benefit Plan [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

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

	Three Months Ended March 31,
	2019		2018
Service cost	$	155	$	151
Cost recognized as a component of compensation cost	155		151
Interest cost	26		29
Cost recognized in other components of defined benefit plans, net	26		29
Net cost	$	181	$	180