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PREPAID LICENSING AND ROYALTY FEES
 12 Months Ended
Dec. 31, 2021
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]  
PREPAID LICENSING AND ROYALTY FEES

NOTE 3. PREPAID LICENSING AND ROYALTY FEES

The following table summarizes changes to our Company’s prepaid licensing and royalty fees:

 

(in US$ thousands)

 

2019

 

 

2020

 

 

2021

 

Balance at beginning of year

 

$

435

 

 

$

44

 

 

$

130

 

Addition

 

 

205

 

 

 

340

 

 

 

98

 

Amortization and usage

 

 

(511

)

 

 

(254

)

 

 

(193

)

Impairment charges

 

 

(85

)

 

 

—

 

 

 

—

 

Balance at end of year

 

$

44

 

 

$

130

 

 

$

35

 

 

At the end of 2019, 2020 and 2021, we recognized impairment losses of $85 thousand, $0 thousand and $0, respectively, for the prepaid licensing and royalty fees related to certain licensed games that we stopped operating or for which the carrying amounts of the related assets were determined not to be recoverable from their expected future undiscounted cash flows.