Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2020

The following table reflects the carrying value of goodwill (in thousands):

	Carrying Value
Balance as of December 31, 2018	$	1,382
Addition: dataxu acquisition		72,734
Balance as of December 31, 2019		74,116
Adjustment: dataxu working capital adjustments		(1,058	)
Balance as of December 31, 2020	$	73,058

The following table is the summary of Company’s intangible assets (in thousands):

	As of December 31, 2020
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Weighted-Average Useful Lives (in years)
Developed technology	$	62,367	$	(13,439	)	$	48,928		5.9
Customer relationships		13,400		(3,908	)		9,492		4.0
Tradename		400		(400	)		—		0.5
Patents		4,076		(315	)		3,761		14.0
Intangible assets	$	80,243	$	(18,062	)	$	62,181

	As of December 31, 2019
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Weighted-Average Useful Lives (in years)
Developed technology	$	62,367	$	(2,860	)	$	59,507		5.9
Customer relationships		13,400		(558	)		12,842		4.0
Tradename		400		(133	)		267		0.5
Patents		4,076		(24	)		4,052		14.0
Intangible assets	$	80,243	$	(3,575	)	$	76,668

The estimated future amortization expense for intangible asset for the next five years and thereafter is as follows (in thousands):