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Other comprehensive income (loss) and accumulated other comprehensive items
 6 Months Ended
Jun. 30, 2018
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]  
Other comprehensive income (loss) and accumulated other comprehensive items
Other comprehensive income (loss) and accumulated other comprehensive items
Other comprehensive income (loss) includes changes in equity that are excluded from net income (loss), such as unrealized gains and losses on marketable securities.
The following tables summarize other comprehensive income (loss) and the changes in accumulated other comprehensive items for the three and six months ended June 30, 2018:

 
 
Unrealized
Gains/(Losses)
On
Marketable
Securities, net
of tax
 
Foreign
Currency
Translation
 
Total
Accumulated
Other
Comprehensive
Items
Balance at March 31, 2018
 
$
(101
)
 
$
5,054

 
$
4,953

Other comprehensive income (loss) before reclassifications
 
40

 
(3,138
)
 
(3,098
)
Amounts reclassified from other comprehensive items
 
—

 
—

 
—

Other comprehensive income (loss)
 
40

 
(3,138
)
 
(3,098
)
Balance at June 30, 2018
 
$
(61
)
 
$
1,916

 
$
1,855

 
 
Unrealized
Gains/(Losses)
On
Marketable
Securities, net
of tax
 
Foreign
Currency
Translation
 
Total
Accumulated
Other
Comprehensive
Items
Balance at December 31, 2017
 
$
22

 
$
3,947

 
$
3,969

Other comprehensive loss before reclassifications
 
(83
)
 
(2,031
)
 
(2,114
)
Amounts reclassified from other comprehensive items
 
—

 
—

 
—

Other comprehensive loss
 
(83
)
 
(2,031
)
 
(2,114
)
Balance at June 30, 2018
 
$
(61
)
 
$
1,916

 
$
1,855