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Retirement Plan (Tables)

12 Months Ended

Dec. 31, 2017

Compensation and Retirement Disclosure [Abstract]

Schedule of Changes in Projected Benefit Obligations [Table Text Block]

The Company uses a measurement date of December 31 for the Defined Benefit Plan. The changes in projected benefit obligation, plan assets and details of the funded status of the Plan are as follows:

		December 31,
		2016			2017
		(in thousands)
Change in projected benefit obligation:
Benefit obligation at beginning of year		$	3,535			3,868
Service cost			16			16
Interest cost			72			72
Actuarial loss			31			76
Effect of foreign currency rate changes			214			326
Benefit obligation at end of year			3,868			4,358
Change in plan assets:
Fair value at beginning of year			2,803			2,992
Actual return on plan assets			21			32
Employer contribution			124			133
Effect of foreign currency rate changes			44			253
Fair value at end of year			2,992			3,410
Funded status		$	(876)			(948)
Amounts recognized in the balance sheet consist of:
Prepaid pension costs		$	188			204
Accrued pension liabilities			(1,064)			(1,152)
Net amount recognized		$	(876)			(948)

Schedule of Net Benefit Costs [Table Text Block]

For the years ended December 31, 2015, 2016 and 2017, the net periodic pension cost consisted of the following:

		Year Ended December 31,
		2015			2016			2017
		(in thousands)
Service cost		$	-			16			16
Interest cost			61			72			72
Expected return on plan assets			(54)			(52)			(52)
Net amortization			59			99			106
Net periodic pension cost		$	66			135			142

Schedule of Assumptions Used [Table Text Block]

At December 31, 2016 and 2017, the weighted-average assumptions used in computing the benefit obligation are as follows:

		December 31,
		2016				2017
Discount rate			1.80	%			1.60	%
Rate of increase in compensation levels			5.00	%			5.00	%

For the years ended December 31, 2015, 2016 and 2017, the weighted average assumptions used in computing net periodic benefit cost are as follows:

		Year Ended December 31,
		2015			2016			2017
		Whole
Discount rate			2.00	%		1.80	%		1.60	%
Rate of increase in compensation levels			5.00	%		5.00	%		5.00	%
Expected long-term rate of return on pension assets			2.00	%		1.80	%		1.60	%

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- References

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- Definition

Tabular disclosure of the assumptions used to determine for pension plans and/or other employee benefit plans the benefit obligation and net benefit cost, including assumed discount rates, rate increase in compensation increase, and expected long-term rates of return on plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (k)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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- Definition

Tabular disclosure of the change in the benefit obligation of pension plans and/or other employee benefit plans from the beginning to the end of the period, showing separately, if applicable, the effects of the following: service cost, interest cost, contributions by plan participants, actuarial gains and losses, foreign currency exchange rate changes, benefits paid, plan amendments, business combinations, divestitures, curtailments, settlements, and special and contractual termination benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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- Definition

Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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