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DEFERRED REVENUE (Tables)
12 Months Ended
Dec. 31, 2019
Deferred Revenue [Abstract]  
Summary of Deferred Revenue

Deferred revenue consists of the following:

 

 

December 31

 

(in US$ thousands)

 

2018

 

 

2019

 

Unused virtual points

 

$

1,094

 

 

$

999

 

Unamortized virtual items

 

 

276

 

 

 

366

 

 

 

$

1,370

 

 

$

1,365