Acquired Intangible Assets and Goodwill

9 Months Ended

Sep. 30, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Acquired Intangible Assets and Goodwill

Acquired Intangible Assets and Goodwill

Acquired Intangible Assets—The following table presents the gross carrying amount and accumulated amortization of intangible assets:

		September 30, 2021						December 31, 2020
	Weighted-Average Useful Lives (Years)	Gross		Accumulated Amortization		Net		Gross		Accumulated Amortization		Net
Trade names	10	$	71,040	$	(4,228)	$	66,812	$	1,040	$	(650)	$	390
Developed technology	3.3	63,480		(12,169)		51,311		2,980		(1,862)		1,118
Customer relationships	10	81,360		(4,627)		76,733		860		(538)		322
Total		$	215,880	$	(21,024)	$	194,856	$	4,880	$	(3,050)	$	1,830

Amortization expense amounted to $8,926 and $122 for the three months ended September 30, 2021 and 2020, respectively, and $17,974 and $366 for the nine months ended September 30, 2021 and 2020, respectively.

The following table presents our estimate of remaining amortization expense for intangible assets that existed as of September 30, 2021:

2021, excluding the nine months ended September 30, 2021	$	8,926
2022	35,705
2023	35,705
2024	20,458
2025	15,050
Thereafter	79,012
Estimated remaining amortization expense	$	194,856

Goodwill—The following table presents the carrying amount of goodwill:

Balance as of December 31, 2020	$	9,186
Goodwill resulting from acquisition	398,042
Balance as of September 30, 2021	$	407,228