Property and Equipment, Net
 12 Months Ended
Dec. 31, 2022
Property, Plant and Equipment [Abstract]  
Property and Equipment, Net
6.
Property and Equipment, Net

 

Property and equipment, net consisted of the following:

 

 

As of December 31,

 

 

2021

 

 

2022

 

 

(US$ thousand)

 

Cost:

 

 

 

 

 

 

       Network equipment

 

$

27,804

 

 

$

27,369

 

       Leasehold improvements

 

 

2,755

 

 

 

3,784

 

       Electronic equipment

 

 

3,324

 

 

 

3,706

 

       Furniture, computers and office equipment

 

 

1,064

 

 

 

1,057

 

       Self-developed software

 

 

—

 

 

 

830

 

Total cost

 

 

34,947

 

 

 

36,746

 

Less: accumulated depreciation

 

 

(16,879

)

 

 

(25,125

)

       Capitalized internal-use software development costs

 

 

844

 

 

 

91

 

       Construction in progress

 

 

282

 

 

 

1,234

 

Property and equipment, net

 

$

19,194

 

 

$

12,946

 

 

Depreciation expense recognized for the years ended December 31, 2020, 2021 and 2022 were US$4.5 million, US$8.3 million and US$9.5 million, respectively.