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Income Taxes (Tables)
6 Months Ended
Jun. 30, 2018
Income Tax Disclosure [Abstract]  
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
The following presents a roll-forward of the Company’s unrecognized tax benefits and associated interest for the six months ended June 30, 2018 (in thousands):
 
 
 
Unrecognized tax
 
 
 
benefits
 
Balance - January 1, 2018
 
$
911
 
Interest accrual
 
 
9
 
Foreign currency revaluation
 
 
(50
)
Balance - June 30, 2018
 
$
870