Intangible Assets, Net
 12 Months Ended
Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets, Net
8.
Intangible Assets, net

 

Intangible asset is comprised of following:

 

 

 

 

 

2021

 

 

2022

 

 

Weighted average amortization period

 

 

Cost

 

 

Accumulated Amortization

 

 

Net

 

 

Cost

 

 

Accumulated Amortization

 

 

Net

 

 

(in years)

 

 

 

 

 

 

 

 

(US$ thousand)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Developed technology (Note 3)

 

 

5

 

 

$

4,169

 

 

$

(705

)

 

$

3,464

 

 

$

2,575

 

 

$

(955

)

 

$

1,620

 

Customer relationships (Note 3)

 

 

3

 

 

 

4,172

 

 

 

(1,159

)

 

 

3,013

 

 

 

2,600

 

 

 

(1,589

)

 

 

1,011

 

Others

 

 

5

 

 

 

335

 

 

 

(115

)

 

 

220

 

 

 

308

 

 

 

(212

)

 

 

96

 

Total

 

 

4

 

 

$

8,676

 

 

$

(1,979

)

 

$

6,697

 

 

$

5,483

 

 

$

(2,756

)

 

$

2,727

 

 

Amortization expense was nil, US$ 1.9 million and US$2.3 million for the year ended December 31, 2020, 2021 and 2022. As of December 31, 2022, the Company will record estimated amortization expenses of US$1.4 million, US$0.7 million, US$0.5 million and US$0.1 million for the years ending December 31, 2023, 2024, 2025 and 2026, respectively.