Intangible Assets

12 Months Ended

Dec. 31, 2019

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Intangible Assets

Intangible Assets

Intangible assets consisted of the following at December 31, 2019 and 2018 (in thousands, except years):

	At December 31, 2019
	Gross Carrying Value		Accumulated Amortization			Net Carrying Value
Acquired technology and domain name	$	40,990	$	(27,560	)	$	13,430
Customer relationships	7,800		(6,175		)	1,625
Trade names	4,900		(2,695		)	2,205
Total	$	53,690	$	(36,430	)	$	17,260

	At December 31, 2018
	Gross Carrying Value		Accumulated Amortization			Net Carrying Value
Acquired technology and domain name	$	40,990	$	(22,946	)	$	18,044
Customer relationships	7,800		(4,925		)	2,875
Trade names	4,900		(2,368		)	2,532
Total	$	53,690	$	(30,239	)	$	23,451

Amortization expense by asset type for the years ended December 31, 2019, 2018, and 2017 is shown below (in thousands):

	Year Ended December 31,
	2019		2018		2017
Acquired technology and domain name	$	4,614	$	3,034	$	3,035
Customer relationships	1,250		500		500
Trade names	327		327		327
Total amortization	$	6,191	$	3,861	$	3,862

Expected amortization expense with respect to intangible assets at December 31, 2019 for each of the five years through December 31, 2024 and thereafter is as follows (in thousands):

Years ended December 31,
2020	$	6,187
2021	4,572
2022	1,977
2023	1,977
2024	1,977
Thereafter	570
Total amortization expense	$	17,260