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Accumulated Other Comprehensive Loss (Tables)
 12 Months Ended
Dec. 31, 2016
Statement of Comprehensive Income [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
The components of accumulated other comprehensive loss, net of tax, are as follows:


Foreign currency translation adjustments

Net unrealized losses on available-for-sale investments

Accumulated other comprehensive loss
Beginning Balance, December 31, 2014

$
2,685


$
(33
)

$
2,652

    Net current period other comprehensive loss

(62
)

33


(29
)
    Reclassifications

—


—


—

Beginning Balance, December 31, 2015

$
2,623


$
—


$
2,623

    Net current period other comprehensive loss

119


37


156

    Reclassifications

—


—


—

Ending balance, December 31, 2016

$
2,742


$
37


$
2,779