INTANGIBLE ASSETS, NET

12 Months Ended

Dec. 31, 2021

11.	INTANGIBLE ASSETS, NET

	As of December 31,
	2020 $			2021 $
Licensing fee		36,914			36,654
IP right		41,602			45,918
Trademarks		10,679			10,679
Technology		15,200			15,200
Software, including internal use software under development		6,512			30,202
Others		5,568			5,269
Total intangible assets, gross		116,475			143,922

Accumulated amortization:
Licensing fee		(32,968	)		(33,704	)
IP right		(32,460	)		(39,357	)
Trademarks		(3,738	)		(4,806	)
Technology		(2,322	)		(4,856	)
Software		(3,982	)		(7,060	)
Others		(1,232	)		(1,622	)
Total accumulated amortization		(76,702	)		(91,405	)
Total intangible assets, net		39,773			52,517

The estimated aggregate amortization expenses of intangible assets, excluding internal use software under development, for each of the five succeeding fiscal years and thereafter are as follows:

	$
2022		14,356
2023		10,409
2024		7,149
2025		5,072
2026		1,858
Thereafter		1,162
		40,006

Amortization expense related to intangible assets was $4,849, $11,694, and $18,350 for the years ended December 31, 2019, 2020 and 2021, respectively.

During the years ended December 31, 2019, 2020 and 2021, the Company determined that the carrying amount related to an intellectual property right (“IP right”) was not recoverable due to changes in market environment and therefore, impairment loss of nil, $5,160 and nil, respectively had been recognized in the consolidated statements of operations as “General and administrative expenses”.