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Comprehensive (Loss) Income
 12 Months Ended
Dec. 31, 2018
Stockholders' Equity Note [Abstract]  
Comprehensive Income (Loss)
Comprehensive (Loss) Income 
The following table shows the components of accumulated other comprehensive (loss) income for the twelve months ended December 31, net of immaterial tax effects:
Accumulated Other Comprehensive (Loss) Income:
 
2018
 
2017
 
2016
 
 
 
 
 
 
 
Foreign currency translation adjustment:
 
 

 
 

 
 
Beginning balance
 
$
(23,202
)
 
$
(23,336
)
 
$
(22,312
)
Net other comprehensive (loss) income
 
(419
)
 
134

 
(1,024
)
Balance at December 31,
 
(23,621
)

(23,202
)

(23,336
)
 
 
 
 
 
 
 
Unrealized gain (loss) on marketable securities, net
 
 

 
 

 
 
Beginning balance
 
(64
)
 
(229
)
 
(345
)
Net other comprehensive income, net of ($18), $28, $16, tax, respectively
 
269

 
165

 
116

Balance at December 31,
 
205


(64
)

(229
)
Accumulated other comprehensive loss at December 31,
 
$
(23,416
)

$
(23,266
)

$
(23,565
)